diff --git a/serversession-backend-acid-state/serversession-backend-acid-state.cabal b/serversession-backend-acid-state/serversession-backend-acid-state.cabal
index 0076033..fbdf85f 100644
--- a/serversession-backend-acid-state/serversession-backend-acid-state.cabal
+++ b/serversession-backend-acid-state/serversession-backend-acid-state.cabal
@@ -20,7 +20,7 @@ library
     , acid-state                >= 0.12
     , containers
     , mtl
-    , safecopy                  == 0.9.*
+    , safecopy                  >= 0.8
     , unordered-containers
 
     , serversession             == 1.0.*
diff --git a/stack.yaml b/stack.yaml
index cd8864b..a9c2e78 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -12,5 +12,3 @@ extra-deps:
   - acid-state-0.14.0
   - nonce-1.0.2
   - wai-session-0.3.2
-  - safecopy-0.9.0.1
-  - cereal-0.5.1.0