diff --git a/stack.yaml b/stack.yaml
index a5e4e03..191295e 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1 +1 @@
-resolver: lts-18.23
+resolver: lts-18.26
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 678fbff..6eab87d 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 587819
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/23.yaml
-    sha256: 7f69bb29a57495586e7e3ed31ecc59c0d2c959cb23bd52b71ca676f254c9beb1
-  original: lts-18.23
+    size: 590102
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/26.yaml
+    sha256: e76d109964d9335abb412e22139c5bce3078be290ac6d90b8ecea6cc009bb198
+  original: lts-18.26