diff --git a/README.md b/README.md
index 64c2c09..1de5f20 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ include(FetchContent)
 FetchContent_Declare(upa
   GIT_REPOSITORY https://github.com/upa-url/upa.git
   GIT_SHALLOW TRUE
-  GIT_TAG v0.3.1
+  GIT_TAG v0.4.0
 )
 FetchContent_MakeAvailable(upa)
 ...
@@ -78,7 +78,7 @@ target_link_libraries(exe-target PRIVATE upa::url)
 If you are using the [CPM.cmake script](https://github.com/cpm-cmake/CPM.cmake) and have included it in your CMakeCMakeLists.txt, then:
 
 ```cmake
-CPMAddPackage("gh:upa-url/upa@0.3.1")
+CPMAddPackage("gh:upa-url/upa@0.4.0")
 ...
 target_link_libraries(exe-target PRIVATE upa::url)
 ```
diff --git a/include/upa/url_version.h b/include/upa/url_version.h
index 44600d3..90a511b 100644
--- a/include/upa/url_version.h
+++ b/include/upa/url_version.h
@@ -9,10 +9,10 @@
 // NOLINTBEGIN(*-macro-*)
 
 #define UPA_URL_VERSION_MAJOR 0
-#define UPA_URL_VERSION_MINOR 3
-#define UPA_URL_VERSION_PATCH 1
+#define UPA_URL_VERSION_MINOR 4
+#define UPA_URL_VERSION_PATCH 0
 
-#define UPA_URL_VERSION "0.3.1"
+#define UPA_URL_VERSION "0.4.0"
 
 // NOLINTEND(*-macro-*)