diff --git a/pom.xml b/pom.xml
index 7d6018f09..39e199aee 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,6 +43,12 @@
 
     <dependencies>
 
+        <dependency>
+            <groupId>org.jspecify</groupId>
+            <artifactId>jspecify</artifactId>
+            <version>1.0.0</version>
+        </dependency>
+
         <dependency>
             <groupId>io.github.openfeign.querydsl</groupId>
             <artifactId>querydsl-apt</artifactId>
diff --git a/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheManager.java b/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheManager.java
index 4e1954adb..e18e09c23 100644
--- a/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheManager.java
+++ b/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheManager.java
@@ -28,7 +28,7 @@
 import org.springframework.cache.Cache;
 import org.springframework.cache.transaction.AbstractTransactionSupportingCacheManager;
 import org.springframework.data.couchbase.CouchbaseClientFactory;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 public class CouchbaseCacheManager extends AbstractTransactionSupportingCacheManager {
diff --git a/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheWriter.java b/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheWriter.java
index cb9450920..55450d7ca 100644
--- a/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheWriter.java
+++ b/src/main/java/org/springframework/data/couchbase/cache/CouchbaseCacheWriter.java
@@ -18,7 +18,7 @@
 
 import java.time.Duration;
 
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 import com.couchbase.client.java.codec.Transcoder;
 
diff --git a/src/main/java/org/springframework/data/couchbase/core/CouchbaseTemplate.java b/src/main/java/org/springframework/data/couchbase/core/CouchbaseTemplate.java
index 5dd5313b9..0d6aabee4 100644
--- a/src/main/java/org/springframework/data/couchbase/core/CouchbaseTemplate.java
+++ b/src/main/java/org/springframework/data/couchbase/core/CouchbaseTemplate.java
@@ -30,7 +30,7 @@
 import org.springframework.data.couchbase.core.mapping.CouchbasePersistentProperty;
 import org.springframework.data.couchbase.core.query.Query;
 import org.springframework.data.mapping.context.MappingContext;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 import com.couchbase.client.java.Collection;
 import com.couchbase.client.java.query.QueryScanConsistency;
diff --git a/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByAnalyticsOperation.java b/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByAnalyticsOperation.java
index 5aaf204b3..4b3b3331a 100644
--- a/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByAnalyticsOperation.java
+++ b/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByAnalyticsOperation.java
@@ -27,7 +27,7 @@
 import org.springframework.data.couchbase.core.support.WithAnalyticsConsistency;
 import org.springframework.data.couchbase.core.support.WithAnalyticsOptions;
 import org.springframework.data.couchbase.core.support.WithAnalyticsQuery;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 import com.couchbase.client.java.analytics.AnalyticsOptions;
 import com.couchbase.client.java.analytics.AnalyticsScanConsistency;
diff --git a/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByQueryOperation.java b/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByQueryOperation.java
index d7f0d24d3..51ef069af 100644
--- a/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByQueryOperation.java
+++ b/src/main/java/org/springframework/data/couchbase/core/ExecutableFindByQueryOperation.java
@@ -29,7 +29,7 @@
 import org.springframework.data.couchbase.core.support.WithDistinct;
 import org.springframework.data.couchbase.core.support.WithQuery;
 import org.springframework.data.couchbase.core.support.WithQueryOptions;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 import com.couchbase.client.java.query.QueryOptions;
 import com.couchbase.client.java.query.QueryScanConsistency;
diff --git a/src/main/java/org/springframework/data/couchbase/core/convert/BooleanToEnumConverterFactory.java b/src/main/java/org/springframework/data/couchbase/core/convert/BooleanToEnumConverterFactory.java
index 7a2bbe8cd..b02241b92 100644
--- a/src/main/java/org/springframework/data/couchbase/core/convert/BooleanToEnumConverterFactory.java
+++ b/src/main/java/org/springframework/data/couchbase/core/convert/BooleanToEnumConverterFactory.java
@@ -20,7 +20,7 @@
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.ConverterFactory;
 import org.springframework.data.convert.ReadingConverter;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 import com.couchbase.client.core.encryption.CryptoManager;
diff --git a/src/main/java/org/springframework/data/couchbase/core/convert/CouchbaseConversionContext.java b/src/main/java/org/springframework/data/couchbase/core/convert/CouchbaseConversionContext.java
index 8226e6d83..fcc3a270b 100644
--- a/src/main/java/org/springframework/data/couchbase/core/convert/CouchbaseConversionContext.java
+++ b/src/main/java/org/springframework/data/couchbase/core/convert/CouchbaseConversionContext.java
@@ -19,7 +19,7 @@
 import org.springframework.data.couchbase.core.mapping.CouchbasePersistentProperty;
 import org.springframework.data.mapping.model.ConvertingPropertyAccessor;
 import org.springframework.data.util.TypeInformation;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 /**
  * {@link ValueConversionContext} that allows to delegate read/write to an underlying {@link CouchbaseConverter}.
diff --git a/src/main/java/org/springframework/data/couchbase/core/convert/IntegerToEnumConverterFactory.java b/src/main/java/org/springframework/data/couchbase/core/convert/IntegerToEnumConverterFactory.java
index 3b02722ed..984e01888 100644
--- a/src/main/java/org/springframework/data/couchbase/core/convert/IntegerToEnumConverterFactory.java
+++ b/src/main/java/org/springframework/data/couchbase/core/convert/IntegerToEnumConverterFactory.java
@@ -20,7 +20,7 @@
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.ConverterFactory;
 import org.springframework.data.convert.ReadingConverter;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 import com.couchbase.client.core.encryption.CryptoManager;
diff --git a/src/main/java/org/springframework/data/couchbase/core/convert/MappingCouchbaseConverter.java b/src/main/java/org/springframework/data/couchbase/core/convert/MappingCouchbaseConverter.java
index f704e4083..0e1d79c1c 100644
--- a/src/main/java/org/springframework/data/couchbase/core/convert/MappingCouchbaseConverter.java
+++ b/src/main/java/org/springframework/data/couchbase/core/convert/MappingCouchbaseConverter.java
@@ -76,7 +76,7 @@
 import org.springframework.data.mapping.model.ValueExpressionParameterValueProvider;
 import org.springframework.data.util.TypeInformation;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
 
diff --git a/src/main/java/org/springframework/data/couchbase/core/convert/StringToEnumConverterFactory.java b/src/main/java/org/springframework/data/couchbase/core/convert/StringToEnumConverterFactory.java
index 472c377fa..adccb4d0d 100644
--- a/src/main/java/org/springframework/data/couchbase/core/convert/StringToEnumConverterFactory.java
+++ b/src/main/java/org/springframework/data/couchbase/core/convert/StringToEnumConverterFactory.java
@@ -18,7 +18,7 @@
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.ConverterFactory;
 import org.springframework.data.convert.ReadingConverter;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 import com.couchbase.client.core.encryption.CryptoManager;
diff --git a/src/main/java/org/springframework/data/couchbase/core/index/CouchbasePersistentEntityIndexResolver.java b/src/main/java/org/springframework/data/couchbase/core/index/CouchbasePersistentEntityIndexResolver.java
index 1ca50fbd1..eb058973d 100644
--- a/src/main/java/org/springframework/data/couchbase/core/index/CouchbasePersistentEntityIndexResolver.java
+++ b/src/main/java/org/springframework/data/couchbase/core/index/CouchbasePersistentEntityIndexResolver.java
@@ -32,7 +32,7 @@
 import org.springframework.data.mapping.PropertyHandler;
 import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.util.TypeInformation;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
diff --git a/src/main/java/org/springframework/data/couchbase/core/query/Meta.java b/src/main/java/org/springframework/data/couchbase/core/query/Meta.java
index fd22d5f3f..b2d6d2bfa 100644
--- a/src/main/java/org/springframework/data/couchbase/core/query/Meta.java
+++ b/src/main/java/org/springframework/data/couchbase/core/query/Meta.java
@@ -20,7 +20,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
diff --git a/src/main/java/org/springframework/data/couchbase/core/query/QueryCriteria.java b/src/main/java/org/springframework/data/couchbase/core/query/QueryCriteria.java
index 70346ac2c..abeff959d 100644
--- a/src/main/java/org/springframework/data/couchbase/core/query/QueryCriteria.java
+++ b/src/main/java/org/springframework/data/couchbase/core/query/QueryCriteria.java
@@ -25,7 +25,7 @@
 import java.util.Locale;
 
 import org.springframework.data.couchbase.core.convert.CouchbaseConverter;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.CollectionUtils;
 
 import com.couchbase.client.core.error.CouchbaseException;
diff --git a/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQuery.java b/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQuery.java
index ddf3ca7a4..e2dade1bb 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQuery.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQuery.java
@@ -30,7 +30,7 @@
 import org.springframework.data.repository.query.RepositoryQuery;
 import org.springframework.data.repository.query.ResultProcessor;
 import org.springframework.data.repository.query.ValueExpressionDelegate;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 /**
diff --git a/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQueryBase.java b/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQueryBase.java
index df2cadd8d..78452f5b5 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQueryBase.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/query/AbstractCouchbaseQueryBase.java
@@ -30,7 +30,7 @@
 import org.springframework.data.repository.query.ResultProcessor;
 import org.springframework.data.repository.query.ValueExpressionDelegate;
 import org.springframework.data.util.TypeInformation;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 /**
diff --git a/src/main/java/org/springframework/data/couchbase/repository/query/AbstractReactiveCouchbaseQuery.java b/src/main/java/org/springframework/data/couchbase/repository/query/AbstractReactiveCouchbaseQuery.java
index 4476b442d..0aa8fca16 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/query/AbstractReactiveCouchbaseQuery.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/query/AbstractReactiveCouchbaseQuery.java
@@ -29,7 +29,7 @@
 import org.springframework.data.repository.query.RepositoryQuery;
 import org.springframework.data.repository.query.ResultProcessor;
 import org.springframework.data.repository.query.ValueExpressionDelegate;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 
 /**
diff --git a/src/main/java/org/springframework/data/couchbase/repository/support/CouchbaseAnnotationProcessor.java b/src/main/java/org/springframework/data/couchbase/repository/support/CouchbaseAnnotationProcessor.java
index 2f3071611..1118bffa0 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/support/CouchbaseAnnotationProcessor.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/support/CouchbaseAnnotationProcessor.java
@@ -37,7 +37,7 @@
 import com.querydsl.core.annotations.QueryEntities;
 import com.querydsl.core.annotations.QuerySupertype;
 import com.querydsl.core.annotations.QueryTransient;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 /**
  * Annotation processor to create Querydsl query types for QueryDsl annotated classes.
diff --git a/src/main/java/org/springframework/data/couchbase/repository/support/CrudMethodMetadataPostProcessor.java b/src/main/java/org/springframework/data/couchbase/repository/support/CrudMethodMetadataPostProcessor.java
index 38f974202..29c5b0967 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/support/CrudMethodMetadataPostProcessor.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/support/CrudMethodMetadataPostProcessor.java
@@ -34,7 +34,7 @@
 import org.springframework.data.couchbase.repository.Scope;
 import org.springframework.data.repository.core.RepositoryInformation;
 import org.springframework.data.repository.core.support.RepositoryProxyPostProcessor;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
diff --git a/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseQuery.java b/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseQuery.java
index 75fff6399..667ea90e7 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseQuery.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseQuery.java
@@ -32,7 +32,7 @@
 import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.support.PageableExecutionUtils;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 import com.mysema.commons.lang.CloseableIterator;
 import com.mysema.commons.lang.EmptyCloseableIterator;
diff --git a/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseSerializer.java b/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseSerializer.java
index 07b4d5d30..7971e1fb8 100644
--- a/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseSerializer.java
+++ b/src/main/java/org/springframework/data/couchbase/repository/support/SpringDataCouchbaseSerializer.java
@@ -28,7 +28,7 @@
 import org.springframework.data.couchbase.core.query.QueryCriteriaDefinition;
 import org.springframework.data.mapping.context.MappingContext;
 
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 
diff --git a/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseCallbackTransactionManager.java b/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseCallbackTransactionManager.java
index 0bd56a69a..f37a072fd 100644
--- a/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseCallbackTransactionManager.java
+++ b/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseCallbackTransactionManager.java
@@ -31,7 +31,7 @@
 import org.springframework.data.couchbase.transaction.error.TransactionRollbackRequestedException;
 import org.springframework.data.couchbase.transaction.error.TransactionSystemAmbiguousException;
 import org.springframework.data.couchbase.transaction.error.TransactionSystemUnambiguousException;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.transaction.IllegalTransactionStateException;
 import org.springframework.transaction.ReactiveTransaction;
 import org.springframework.transaction.TransactionDefinition;
diff --git a/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseResourceHolder.java b/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseResourceHolder.java
index d0d54be0d..6f5bb9eb3 100644
--- a/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseResourceHolder.java
+++ b/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseResourceHolder.java
@@ -18,7 +18,7 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.transaction.support.ResourceHolderSupport;
 
 import com.couchbase.client.core.annotation.Stability;
diff --git a/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseTransactionInterceptor.java b/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseTransactionInterceptor.java
index 6cd7accc8..35be17d84 100644
--- a/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseTransactionInterceptor.java
+++ b/src/main/java/org/springframework/data/couchbase/transaction/CouchbaseTransactionInterceptor.java
@@ -20,7 +20,7 @@
 
 import com.couchbase.client.core.annotation.Stability;
 import org.aopalliance.intercept.MethodInterceptor;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.transaction.TransactionManager;
 import org.springframework.transaction.interceptor.TransactionAttribute;
 import org.springframework.transaction.interceptor.TransactionAttributeSource;
diff --git a/src/test/java/org/springframework/data/couchbase/domain/Person.java b/src/test/java/org/springframework/data/couchbase/domain/Person.java
index c42c46e20..d30dfea39 100644
--- a/src/test/java/org/springframework/data/couchbase/domain/Person.java
+++ b/src/test/java/org/springframework/data/couchbase/domain/Person.java
@@ -27,7 +27,7 @@
 import org.springframework.data.couchbase.core.mapping.Document;
 import org.springframework.data.couchbase.core.mapping.Field;
 import org.springframework.data.domain.Persistable;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 
 /**
  * Person entity for tests.
diff --git a/src/test/java/org/springframework/data/couchbase/transactions/CouchbaseTransactionalPropagationIntegrationTests.java b/src/test/java/org/springframework/data/couchbase/transactions/CouchbaseTransactionalPropagationIntegrationTests.java
index cbd0f536f..8b4f94cfc 100644
--- a/src/test/java/org/springframework/data/couchbase/transactions/CouchbaseTransactionalPropagationIntegrationTests.java
+++ b/src/test/java/org/springframework/data/couchbase/transactions/CouchbaseTransactionalPropagationIntegrationTests.java
@@ -42,7 +42,7 @@
 import org.springframework.data.couchbase.util.ClusterType;
 import org.springframework.data.couchbase.util.IgnoreWhen;
 import org.springframework.data.couchbase.util.JavaIntegrationTests;
-import org.springframework.lang.Nullable;
+import org.jspecify.annotations.Nullable;
 import org.springframework.stereotype.Service;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;