diff --git a/stack.yaml b/stack.yaml
index 66573a1..e35be72 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-22.31
+resolver: lts-22.33
 
 ghc-options:
   "$everything": -haddock
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 5eb6c1b..499f087 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -83,7 +83,7 @@ packages:
     hackage: RtMidi-0.8.0.0
 snapshots:
 - completed:
-    sha256: acaab6ca693211938d1542abcb1c83a2f298b9f6b571854a9d38febe39b6408e
-    size: 719577
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/31.yaml
-  original: lts-22.31
+    sha256: 098936027eaa1ef14e2b8eb39d9933a973894bb70a68684a1bbf00730249879b
+    size: 720001
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/33.yaml
+  original: lts-22.33