diff --git a/misc/tools.func b/misc/tools.func
index bfe6cba..dde04c7 100644
--- a/misc/tools.func
+++ b/misc/tools.func
@@ -632,7 +632,7 @@ is_tool_installed() {
     ;;
   mongodb | mongod)
     if command -v mongod >/dev/null 2>&1; then
-      installed_version=$(mongod --version 2>/dev/null | awk '/db version/{print $3}' | cut -d. -f1,2)
+      installed_version=$(mongod --version 2>/dev/null | awk '/db version/{print $3}' | sed 's/^v//' | cut -d. -f1,2)
     fi
     ;;
   node | nodejs)