diff --git a/scripts/sync-version b/scripts/sync-version
index c8eefe1deb..b253fbd910 100755
--- a/scripts/sync-version
+++ b/scripts/sync-version
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-SEMVER_REGEX="([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+[0-9A-Za-z-]+)?"
+SEMVER_REGEX="([0-9]+)\.([0-9]+)\.([0-9]+)(-([0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*))?(\+[0-9A-Za-z-]+)?"
 CHANGELOG_VERSION=$(grep -o -E $SEMVER_REGEX CHANGELOG.md | sed -n 2p)
 VERSION=$(grep -o -E $SEMVER_REGEX httpx/__version__.py | head -1)
 echo "CHANGELOG_VERSION: $CHANGELOG_VERSION"