diff --git a/server/gitea/client.go b/server/gitea/client.go
index 575ebbc..2e5631f 100644
--- a/server/gitea/client.go
+++ b/server/gitea/client.go
@@ -146,7 +146,7 @@ func (client *Client) ServeRawContent(targetOwner, targetRepo, ref, resource str
 						log.Error().Err(err).Msg("could not save symlink in cache")
 					}
 
-					log.Debug().Msgf("follow symlink from '%s' to '%s'", resource, linkDest)
+					log.Debug().Msgf("follow symlink from %q to %q", resource, linkDest)
 					return client.ServeRawContent(targetOwner, targetRepo, ref, linkDest)
 				}
 			}
diff --git a/server/handler.go b/server/handler.go
index 460875c..da33702 100644
--- a/server/handler.go
+++ b/server/handler.go
@@ -212,7 +212,7 @@ func Handler(mainDomainSuffix, rawDomain string,
 						canonicalDomainCache)
 				} else {
 					html.ReturnErrorPage(ctx,
-						fmt.Sprintf("explizite set branch '%s' do not exist at '%s/%s'", branch, targetOwner, targetRepo),
+						fmt.Sprintf("explizite set branch %q do not exist at '%s/%s'", branch, targetOwner, targetRepo),
 						http.StatusFailedDependency)
 				}
 				return
@@ -231,7 +231,7 @@ func Handler(mainDomainSuffix, rawDomain string,
 						canonicalDomainCache)
 				} else {
 					html.ReturnErrorPage(ctx,
-						fmt.Sprintf("explizite set branch '%s' do not exist at '%s/%s'", branch, targetOwner, "pages"),
+						fmt.Sprintf("explizite set branch %q do not exist at '%s/%s'", branch, targetOwner, "pages"),
 						http.StatusFailedDependency)
 				}
 				return
diff --git a/server/upstream/helper.go b/server/upstream/helper.go
index fa872c2..6bc23c8 100644
--- a/server/upstream/helper.go
+++ b/server/upstream/helper.go
@@ -20,7 +20,7 @@ func GetBranchTimestamp(giteaClient *gitea.Client, owner, repo, branch string) *
 			log.Err(err).Msg("Could't fetch default branch from repository")
 			return nil
 		}
-		log.Debug().Msgf("Succesfully fetched default branch '%s' from Gitea", defaultBranch)
+		log.Debug().Msgf("Succesfully fetched default branch %q from Gitea", defaultBranch)
 		branch = defaultBranch
 	}
 
diff --git a/server/upstream/upstream.go b/server/upstream/upstream.go
index 370c4ee..d37c35e 100644
--- a/server/upstream/upstream.go
+++ b/server/upstream/upstream.go
@@ -66,7 +66,7 @@ func (o *Options) Upstream(ctx *context.Context, giteaClient *gitea.Client) (fin
 
 		if branch == nil || branch.Branch == "" {
 			html.ReturnErrorPage(ctx,
-				fmt.Sprintf("could not get timestamp of branch '%s'", o.TargetBranch),
+				fmt.Sprintf("could not get timestamp of branch %q", o.TargetBranch),
 				http.StatusFailedDependency)
 			return true
 		}