diff --git a/stack.yaml b/stack.yaml
index b48670d..dc55a91 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-23.0
+resolver: lts-23.1
 
 ghc-options:
   "$everything": -haddock
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 0ee980e..673dcd1 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -83,7 +83,7 @@ packages:
     hackage: prop-unit-1.0.1
 snapshots:
 - completed:
-    sha256: 9444fadfa30b67a93080254d53872478c087592ad64443e47c546cdcd13149ae
-    size: 678857
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/0.yaml
-  original: lts-23.0
+    sha256: 18514ff1ed00330c922bd8d28d88a54670a9849f17eb07dc78391a94d576749d
+    size: 678854
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/1.yaml
+  original: lts-23.1