diff --git a/frontend/ios/fastlane/Fastfile b/frontend/ios/fastlane/Fastfile
index f78bd61..fab7574 100644
--- a/frontend/ios/fastlane/Fastfile
+++ b/frontend/ios/fastlane/Fastfile
@@ -31,9 +31,9 @@ platform :ios do
     # replace secrets by real values, the stupid way
     sh(
       "sed",
-      "-i",
-      "",
-      "s/IOS_GOOGLE_MAPS_API_KEY/#{ENV["IOS_GOOGLE_MAPS_API_KEY"]}/g",
+      "-i", 
+      "''", 
+      "s/IOS_GOOGLE_MAPS_API_KEY/#{ENV["IOS_GOOGLE_MAPS_API_KEY"]}/g", 
       "../Runner/AppDelegate.swift"
     )
     
@@ -78,7 +78,7 @@ platform :ios do
     sh(
       "sed",
       "-i",
-      "",
+      "''",
       "s/IOS_GOOGLE_MAPS_API_KEY/#{ENV["IOS_GOOGLE_MAPS_API_KEY"]}/g",
       "../Runner/AppDelegate.swift"
     )