diff --git a/frontend/main.go b/frontend/main.go
index 0bcac03b..9cf49af9 100644
--- a/frontend/main.go
+++ b/frontend/main.go
@@ -75,7 +75,7 @@ func main() {
 
 	log.Println("Creating submission directory...")
 	if _, err := os.Stat(TmpSubmissionDir); os.IsNotExist(err) {
-		if err := os.MkdirAll(TmpSubmissionDir, 0777); err != nil {
+		if err := os.MkdirAll(TmpSubmissionDir, 0700); err != nil {
 			log.Fatal("Unable to create submission directory: ", err)
 		}
 	}
diff --git a/frontend/save.go b/frontend/save.go
index bb2009b9..78089eb2 100644
--- a/frontend/save.go
+++ b/frontend/save.go
@@ -38,7 +38,7 @@ func saveTeamFile(dirname string, team string, filename string, w http.ResponseW
 
 func saveFile(dirname string, filename string, r *http.Request) error {
 	if _, err := os.Stat(dirname); os.IsNotExist(err) {
-		if err := os.MkdirAll(dirname, 0777); err != nil {
+		if err := os.MkdirAll(dirname, 0755); err != nil {
 			return err
 		}
 	}