diff --git a/pom.xml b/pom.xml
index 56582d2..2369f24 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
   <licenses>
     <license>
       <name>Eclipse Public License 1.0</name>
-      <url>http://opensource.org/licenses/eclipse-1.0.php</url>
+      <url>https://opensource.org/license/epl-1-0/</url>
       <distribution>repo</distribution>
     </license>
   </licenses>
@@ -17,7 +17,7 @@
   <parent>
     <groupId>org.clojure</groupId>
     <artifactId>pom.contrib</artifactId>
-    <version>0.2.2</version>
+    <version>1.2.0</version>
   </parent>
 
   <developers>
@@ -35,9 +35,7 @@
   </scm>
 
   <properties>
-    <!-- core.rrb-vector depends on implementation details of vectors
-         which were made public in Clojure 1.5.0 -->
-    <clojure.version>1.6.0</clojure.version>
+    <clojure.version>1.9.0</clojure.version>
     <clojure.warnOnReflection>true</clojure.warnOnReflection>
   </properties>
 
@@ -75,16 +73,10 @@
   </build>
 
   <dependencies>
-    <dependency>
-      <groupId>org.codehaus.jsr166-mirror</groupId>
-      <artifactId>jsr166y</artifactId>
-      <version>1.7.0</version>
-      <scope>provided</scope>
-    </dependency>
     <dependency>
       <groupId>org.clojure</groupId>
       <artifactId>test.check</artifactId>
-      <version>0.7.0</version>
+      <version>1.1.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>
diff --git a/project.clj b/project.clj
index ba1b3f1..f8b4f7f 100644
--- a/project.clj
+++ b/project.clj
@@ -4,25 +4,21 @@
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
   :min-lein-version "2.2.0"
-  :parent [org.clojure/pom.contrib "0.2.2"]
-  :dependencies [[org.clojure/clojure "1.5.1"]]
+  :parent [org.clojure/pom.contrib "1.2.0"]
+  :dependencies [[org.clojure/clojure "1.9.0"]]
   :source-paths ["src/main/clojure" "src/main/cljs"]
   ;;:source-paths ["src/parameterized/clojure" "src/main/cljs"]
   :test-paths ["src/test/clojure"]
   :test-selectors {:default (complement :cljs-nashorn)}
   :jvm-opts ^:replace ["-XX:+UseG1GC"
                        "-XX:-OmitStackTraceInFastThrow"]
-  :profiles {:dev {:dependencies [[org.clojure/test.check "0.7.0"]]
+  :profiles {:dev {:dependencies [[org.clojure/test.check "1.1.1"]]
                    :plugins [[lein-cljsbuild "1.1.7"]]}
              :coll {:test-paths ["src/test_local/clojure"]
-                    :dependencies [[org.clojure/test.check "0.9.0"]
+                    :dependencies [[org.clojure/test.check "1.1.1"]
                                    [collection-check "0.1.7"]]}
              :cljs {:dependencies [[org.clojure/clojure "1.10.1"]
                                    [org.clojure/clojurescript "1.10.238"]]}
-             :1.5 {:dependencies [[org.clojure/clojure "1.5.1"]]}
-             :1.6 {:dependencies [[org.clojure/clojure "1.6.0"]]}
-             :1.7 {:dependencies [[org.clojure/clojure "1.7.0"]]}
-             :1.8 {:dependencies [[org.clojure/clojure "1.8.0"]]}
              :1.9 {:dependencies [[org.clojure/clojure "1.9.0"]]}
              :1.10 {:dependencies [[org.clojure/clojure "1.10.1"]]}
              :master {:dependencies [[org.clojure/clojure "1.11.0-master-SNAPSHOT"]]}}