diff --git a/tls-session-manager.cabal b/tls-session-manager.cabal
--- a/tls-session-manager.cabal
+++ b/tls-session-manager.cabal
@@ -1,5 +1,5 @@
 name:                tls-session-manager
-version:             0.0.2.1
+version:             0.0.3
 synopsis:            In-memory TLS session manager
 description:         TLS session manager with limitation, automatic pruning, energy saving and replay resistance
 license:             BSD3
@@ -27,3 +27,5 @@
   -- hs-source-dirs:
   default-language:    Haskell2010
   ghc-options:       -Wall
+  if impl(ghc >= 8)
+      default-extensions:  Strict StrictData