diff --git a/lib/util/git/private-key.ts b/lib/util/git/private-key.ts
index 1b5a911b84b52258119bde3b3a068e1a02852329..1c3f6bfe66e3b7953ce0ed17dfcbfa86226416b2 100644
--- a/lib/util/git/private-key.ts
+++ b/lib/util/git/private-key.ts
@@ -9,7 +9,7 @@ let gitPrivateKey: string;
 let keyId: string;
 
 export function setPrivateKey(key: string): void {
-  gitPrivateKey = key;
+  gitPrivateKey = key?.trim();
 }
 
 async function importKey(): Promise<void> {