diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36a3d8a..747c3a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## unreleased
 
+## 1.0.1 - 2023-03-11
+
+### Fixed
+
+ - Fix the `DOWNLOAD_EXTRACT_TIMESTAMP` CMake warning (see [datatype99/issues/15](https://github.com/Hirrolot/datatype99/issues/15)).
+
 ## 1.0.0 - 2022-05-15
 
 ### Added
diff --git a/interface99.h b/interface99.h
index 1f32f00..f9fcce5 100644
--- a/interface99.h
+++ b/interface99.h
@@ -87,7 +87,7 @@ SOFTWARE.
 
 #define IFACE99_MAJOR 1
 #define IFACE99_MINOR 0
-#define IFACE99_PATCH 0
+#define IFACE99_PATCH 1
 
 #define IFACE99_VERSION_COMPATIBLE(x, y, z)                                                        \
     (IFACE99_MAJOR == (x) &&                                                                       \