diff --git a/install.sh b/install.sh
index 684da1e..b262732 100644
--- a/install.sh
+++ b/install.sh
@@ -9,7 +9,7 @@ if [ $# -eq 0 ]; then
     echo "DOWNLOADING    $latest_release_uri"
     version=$( command curl -sSf "$latest_release_uri" |
         command grep -Eo "tag_name\": .*" |
-        command grep -Eo "[0-9.]*" )
+        command grep -Eo "[0-9.]+" )
     if [ ! "$version" ]; then exit 1; fi
 else
     version="${1}"