diff --git a/scroll_overlay/analysis_option.yaml b/scroll_overlay/analysis_option.yaml
index c8c2c82..c3044cd 100644
--- a/scroll_overlay/analysis_option.yaml
+++ b/scroll_overlay/analysis_option.yaml
@@ -2,8 +2,9 @@
 #
 # Copied over from flutter/flutter repo.
 analyzer:
-  strong-mode:
-    implicit-dynamic: false
+  language:
+    strict-casts: true
+    strict-raw-types: true
   errors:
     # treat missing required parameters as a warning (not a hint)
     missing_required_param: warning