diff --git a/bases/strictest.json b/bases/strictest.json
index f7777dc..406761b 100644
--- a/bases/strictest.json
+++ b/bases/strictest.json
@@ -9,6 +9,7 @@
     "noImplicitReturns": true,
     "noPropertyAccessFromIndexSignature": true,
     "noUncheckedIndexedAccess": true,
+    "noUncheckedSideEffectImports": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,