diff --git a/cogito/putter.go b/cogito/putter.go
index e10a4d1..ef1d341 100644
--- a/cogito/putter.go
+++ b/cogito/putter.go
@@ -333,6 +333,7 @@ func concourseBuildURL(env Environment) string {
 	// https://ci.example.com/teams/main/pipelines/cogito/jobs/autocat/builds/3?vars=%7B%22branch%22%3A%22stable%22%7D
 	if env.BuildPipelineInstanceVars != "" {
 		buildURL += fmt.Sprintf("?vars=%s", url.QueryEscape(env.BuildPipelineInstanceVars))
+		buildURL = strings.Replace(buildURL, "+", "%20", -1)
 	}
 
 	return buildURL