diff --git a/stack-ghc8.yaml b/stack-ghc8.yaml
index 2cb8ab434..78db75b81 100644
--- a/stack-ghc8.yaml
+++ b/stack-ghc8.yaml
@@ -1,7 +1,7 @@
 # stack config for building with GHC 8, tested 2016/7/22
 # $ stack --stack-yaml stack-ghc8.yaml install
 
-resolver: nightly-2016-07-19
+resolver: nightly-2016-08-01
 
 packages:
 - hledger-lib
diff --git a/stack.yaml b/stack.yaml
index 43e3c22b4..3f0e253f8 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,5 +1,5 @@
 # this or a newer snapshot is suggested (hledger-api/servant/aeson requires > lts-5)
-resolver: lts-6.8
+resolver: lts-6.10
 
 packages:
 - hledger-lib