diff --git a/stack.yaml b/stack.yaml
index 523d9bc..5ace372 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-18.14
+resolver: nightly-2023-12-26
 save-hackage-creds: false
 flags:
   websockets:
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 27992b7..3fdeae8 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -7,13 +7,13 @@ packages:
 - completed:
     hackage: hakyll-4.15.1.0@sha256:df90fdb1e7e09e90557ad23a6d402ce042f820f690595e7e73db82220edcadcf,9924
     pantry-tree:
-      size: 8860
       sha256: 474bd1e22b8eb6c7ad8e397c1c6741204fff4b30ebc5d9d47576c43820d17e13
+      size: 8860
   original:
     hackage: hakyll-4.15.1.0
 snapshots:
 - completed:
-    size: 586069
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/14.yaml
-    sha256: 87842ecbaa8ca9cee59a7e6be52369dbed82ed075cb4e0d152614a627e8fd488
-  original: lts-18.14
+    sha256: b69a06c70e1092e2aa60ce69a4877c6181fbe53dfb7ea041cb98d97617d6007f
+    size: 716491
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/nightly/2023/12/26.yaml
+  original: nightly-2023-12-26
diff --git a/websockets.cabal b/websockets.cabal
index 804c46a..68dbc04 100644
--- a/websockets.cabal
+++ b/websockets.cabal
@@ -85,7 +85,7 @@ Library
     base              >= 4.8    && < 5,
     base64-bytestring >= 0.1    && < 1.3,
     binary            >= 0.8.1  && < 0.11,
-    bytestring        >= 0.9    && < 0.12,
+    bytestring        >= 0.9    && < 0.13,
     case-insensitive  >= 0.3    && < 1.3,
     containers        >= 0.3    && < 0.7,
     network           >= 2.3    && < 3.2,
@@ -143,7 +143,7 @@ Test-suite websockets-tests
     base              >= 4      && < 5,
     base64-bytestring >= 0.1    && < 1.3,
     binary            >= 0.8.1  && < 0.11,
-    bytestring        >= 0.9    && < 0.12,
+    bytestring        >= 0.9    && < 0.13,
     case-insensitive  >= 0.3    && < 1.3,
     containers        >= 0.3    && < 0.7,
     network           >= 2.3    && < 3.2,
@@ -203,7 +203,7 @@ Executable websockets-autobahn
     base              >= 4      && < 5,
     base64-bytestring >= 0.1    && < 1.3,
     binary            >= 0.8.1  && < 0.11,
-    bytestring        >= 0.9    && < 0.12,
+    bytestring        >= 0.9    && < 0.13,
     case-insensitive  >= 0.3    && < 1.3,
     containers        >= 0.3    && < 0.7,
     network           >= 2.3    && < 3.2,
@@ -230,7 +230,7 @@ Benchmark bench-mask
     base              >= 4      && < 5,
     base64-bytestring >= 0.1    && < 1.3,
     binary            >= 0.8.1  && < 0.11,
-    bytestring        >= 0.9    && < 0.12,
+    bytestring        >= 0.9    && < 0.13,
     case-insensitive  >= 0.3    && < 1.3,
     containers        >= 0.3    && < 0.7,
     network           >= 2.3    && < 3.2,