diff --git a/compiler/core/src/zserio/tools/ZserioVersion.java b/compiler/core/src/zserio/tools/ZserioVersion.java
index 679f18bea..e2cd0a471 100644
--- a/compiler/core/src/zserio/tools/ZserioVersion.java
+++ b/compiler/core/src/zserio/tools/ZserioVersion.java
@@ -155,7 +155,7 @@ private int comparePreRelease(Integer otherPreRelease)
     }
 
     /** ZserioTool version string. */
-    public static final String VERSION_STRING = "2.5.0";
+    public static final String VERSION_STRING = "2.5.1";
 
     private final int major;
     private final int minor;
diff --git a/compiler/extensions/cpp/runtime/doc/doxyfile b/compiler/extensions/cpp/runtime/doc/doxyfile
index ac21d4470..a82ac8a5e 100644
--- a/compiler/extensions/cpp/runtime/doc/doxyfile
+++ b/compiler/extensions/cpp/runtime/doc/doxyfile
@@ -1,5 +1,5 @@
 PROJECT_NAME           = Zserio
-PROJECT_NUMBER         = 2.5.0
+PROJECT_NUMBER         = 2.5.1
 PROJECT_BRIEF          = "C++ runtime library"
 OUTPUT_DIRECTORY       = .
 DISTRIBUTE_GROUP_DOC   = YES
diff --git a/compiler/extensions/cpp/runtime/src/zserio/CppRuntimeVersion.h b/compiler/extensions/cpp/runtime/src/zserio/CppRuntimeVersion.h
index f50bdc472..d052ba9cf 100644
--- a/compiler/extensions/cpp/runtime/src/zserio/CppRuntimeVersion.h
+++ b/compiler/extensions/cpp/runtime/src/zserio/CppRuntimeVersion.h
@@ -4,6 +4,6 @@
 /**
  * C++ extension runtime version string.
  */
-#define CPP_EXTENSION_RUNTIME_VERSION_STRING "2.5.0"
+#define CPP_EXTENSION_RUNTIME_VERSION_STRING "2.5.1"
 
 #endif // ifndef ZSERIO_CPP_RUNTIME_VERSION_H_INC
diff --git a/compiler/extensions/cpp/src/zserio/extension/cpp/CppExtensionVersion.java b/compiler/extensions/cpp/src/zserio/extension/cpp/CppExtensionVersion.java
index a17587414..7c88a80c5 100644
--- a/compiler/extensions/cpp/src/zserio/extension/cpp/CppExtensionVersion.java
+++ b/compiler/extensions/cpp/src/zserio/extension/cpp/CppExtensionVersion.java
@@ -9,5 +9,5 @@
 public class CppExtensionVersion
 {
     /** C++ extension version string. */
-    public static final String VERSION_STRING = "2.5.0";
+    public static final String VERSION_STRING = "2.5.1";
 }
diff --git a/compiler/extensions/doc/src/zserio/extension/doc/DocExtensionVersion.java b/compiler/extensions/doc/src/zserio/extension/doc/DocExtensionVersion.java
index d66dbde5d..67a1ee540 100644
--- a/compiler/extensions/doc/src/zserio/extension/doc/DocExtensionVersion.java
+++ b/compiler/extensions/doc/src/zserio/extension/doc/DocExtensionVersion.java
@@ -8,5 +8,5 @@
  */
 class DocExtensionVersion
 {
-    public static final String VERSION_STRING = "2.5.0";
+    public static final String VERSION_STRING = "2.5.1";
 }
diff --git a/compiler/extensions/java/src/zserio/extension/java/JavaExtensionVersion.java b/compiler/extensions/java/src/zserio/extension/java/JavaExtensionVersion.java
index c184bcdbc..b08b46f3f 100644
--- a/compiler/extensions/java/src/zserio/extension/java/JavaExtensionVersion.java
+++ b/compiler/extensions/java/src/zserio/extension/java/JavaExtensionVersion.java
@@ -9,5 +9,5 @@
 public class JavaExtensionVersion
 {
     /** Java extension version string. */
-    public static final String VERSION_STRING = "2.5.0";
+    public static final String VERSION_STRING = "2.5.1";
 }
diff --git a/compiler/extensions/python/runtime/src/zserio/__init__.py b/compiler/extensions/python/runtime/src/zserio/__init__.py
index e26b4892f..b6e618641 100644
--- a/compiler/extensions/python/runtime/src/zserio/__init__.py
+++ b/compiler/extensions/python/runtime/src/zserio/__init__.py
@@ -31,4 +31,4 @@
 from zserio import service
 from zserio import typeinfo
 
-VERSION_STRING = "2.5.0"
+VERSION_STRING = "2.5.1"
diff --git a/compiler/extensions/python/src/zserio/extension/python/PythonExtensionVersion.java b/compiler/extensions/python/src/zserio/extension/python/PythonExtensionVersion.java
index c733c6f06..dfe7096f7 100644
--- a/compiler/extensions/python/src/zserio/extension/python/PythonExtensionVersion.java
+++ b/compiler/extensions/python/src/zserio/extension/python/PythonExtensionVersion.java
@@ -9,5 +9,5 @@
 class PythonExtensionVersion
 {
     /** Python extension version string. */
-    public static final String VERSION_STRING = "2.5.0";
+    public static final String VERSION_STRING = "2.5.1";
 }
diff --git a/compiler/extensions/xml/src/zserio/extension/xml/XmlExtensionVersion.java b/compiler/extensions/xml/src/zserio/extension/xml/XmlExtensionVersion.java
index 4dc0025ed..434d27c11 100644
--- a/compiler/extensions/xml/src/zserio/extension/xml/XmlExtensionVersion.java
+++ b/compiler/extensions/xml/src/zserio/extension/xml/XmlExtensionVersion.java
@@ -9,5 +9,5 @@
 public class XmlExtensionVersion
 {
     /** XML extension version string. */
-    public static final String VERSION_STRING = "2.5.0";
+    public static final String VERSION_STRING = "2.5.1";
 }