diff --git a/scripts/prepare_changelog.sh b/scripts/prepare_changelog.sh
index c2f59b20c..88366d52c 100755
--- a/scripts/prepare_changelog.sh
+++ b/scripts/prepare_changelog.sh
@@ -30,7 +30,7 @@ fi
 
 get_prs(){
     # git log v0.10.2...c3861d167533fb797b0fae0c380806625712e5f7 |
-    git log HEAD...${LAST_RELEASE} --first-parent --oneline --grep="Merge pull request #[0-9]\+" --grep="\(#[0-9]\+\)$" |
+    git log HEAD...${LAST_RELEASE} --first-parent --oneline --grep="Merge pull request #[0-9]\+" --grep="(#[0-9]\+)$" |
     grep -o "#\([0-9]\+\)" | awk -F\# '{print $2}' | while read line
     do
         grep -q "GH-${line}" CHANGELOG.md