diff --git a/src/resolve/git.ts b/src/resolve/git.ts
index 8f43f423ee..74eb2132e2 100644
--- a/src/resolve/git.ts
+++ b/src/resolve/git.ts
@@ -9,7 +9,7 @@ export default async function resolveGithub (parsedSpec: PackageSpec, opts: Reso
   const repo = parts[0]
   const ref = parts[1] || 'master'
   return {
-    id: parsedSpec.spec.replace(/\//g, delimiter),
+    id: parsedSpec.spec.replace(/[\/:]/g, delimiter),
     fetch: (target: string) => {
       return clone(repo, ref, target)
     }