diff --git a/tools/codestyle/clang_format.hook b/tools/codestyle/clang_format.hook
index d646e52c4369f80ccf3fe225a83670308c9dd23c..1d928216867c0ba3897d71542fea44debf8d72a0 100755
--- a/tools/codestyle/clang_format.hook
+++ b/tools/codestyle/clang_format.hook
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -e
 
-readonly VERSION="3.9"
+readonly VERSION="3.8"
 
 version=$(clang-format -version)