diff --git a/stack.yaml b/stack.yaml
index 5230206..6360df5 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,5 +1,5 @@
 ---
-resolver: lts-13.20
+resolver: lts-14.3
 
 packages:
   - .
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 3a5a530..256e040 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -20,7 +20,7 @@ packages:
     hackage: crockford-0.2@sha256:6ec593711a20bd4b81a0fc13f3d850d2d890690941d777230fbf980c483e434a
 snapshots:
 - completed:
-    size: 498167
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/13/20.yaml
-    sha256: cda928d57b257a5f17bcad796843c9daa674fef47d600dbea3aa7b0e49d64a11
-  original: lts-13.20
+    size: 523878
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/14/3.yaml
+    sha256: 470c46c27746a48c7c50f829efc0cf00112787a7804ee4ac7a27754658f6d92c
+  original: lts-14.3