diff --git a/packages/relay/tsconfig.json b/packages/relay/tsconfig.json
index 22cd79da81..3a4f9e6df1 100644
--- a/packages/relay/tsconfig.json
+++ b/packages/relay/tsconfig.json
@@ -14,8 +14,7 @@
         "forceConsistentCasingInFileNames": true,
         "noImplicitAny": false,
         "declaration": true,
-        "strict": true,
-        "sourceMap": true
+        "strict": true
     },
     "include": [
         "src"
diff --git a/packages/server/tsconfig.json b/packages/server/tsconfig.json
index 22cd79da81..3a4f9e6df1 100644
--- a/packages/server/tsconfig.json
+++ b/packages/server/tsconfig.json
@@ -14,8 +14,7 @@
         "forceConsistentCasingInFileNames": true,
         "noImplicitAny": false,
         "declaration": true,
-        "strict": true,
-        "sourceMap": true
+        "strict": true
     },
     "include": [
         "src"