diff --git a/Makefile b/Makefile
index 519e4c2..b67c139 100644
--- a/Makefile
+++ b/Makefile
@@ -68,8 +68,8 @@ lint:
 # Bump go version
 .PHONY: bump_go_version
 bump_go_version:
-	@printf "go version? "; read version; \
-	go mod edit -go="$$(echo $$version | sed -e 's@\.[0-9]\+$$@@')"
+	@printf "go version (x.y.z)? "; read version; \
+	go mod edit -go="$$version"
 	go mod tidy
 
 # Generate binary archives for release check on local machine
diff --git a/go.mod b/go.mod
index ff4ffd2..cc3237d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/masutaka/github-nippou/v4
 
-go 1.22
+go 1.22.5
 
 require (
 	github.com/google/go-github/v63 v63.0.0