diff --git a/flake.lock b/flake.lock
index 5cb3bce..46b28fe 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
         "type": "github"
       },
       "original": {
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1699099776,
-        "narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
+        "lastModified": 1703438236,
+        "narHash": "sha256-aqVBq1u09yFhL7bj1/xyUeJjzr92fXVvQSSEx6AdB1M=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
+        "rev": "5f64a12a728902226210bf01d25ec6cbb9d9265b",
         "type": "github"
       },
       "original": {
diff --git a/nvim-hs.cabal b/nvim-hs.cabal
index f66f8ac..fe9db6e 100644
--- a/nvim-hs.cabal
+++ b/nvim-hs.cabal
@@ -76,7 +76,7 @@ common defaults
   build-depends:        base >=4.9 && < 5 
                       , containers
                       , data-default
-                      , deepseq >= 1.1 && < 1.5
+                      , deepseq >= 1.1 && < 2
                       , prettyprinter
                       , prettyprinter-ansi-terminal
                       , unliftio >= 0.2
diff --git a/stack-ghc-9.4.yaml b/stack-ghc-9.4.yaml
index d15dd5d..1ed01fc 100644
--- a/stack-ghc-9.4.yaml
+++ b/stack-ghc-9.4.yaml
@@ -2,7 +2,7 @@ flags: {}
 packages:
 - '.'
 
-resolver: lts-21.19
+resolver: lts-21.25
 extra-deps: []
 
 allow-newer: false
diff --git a/stack-ghc-9.6.yaml b/stack-ghc-9.6.yaml
index ad0ebc4..43d1724 100644
--- a/stack-ghc-9.6.yaml
+++ b/stack-ghc-9.6.yaml
@@ -2,7 +2,7 @@ flags: {}
 packages:
 - '.'
 
-resolver: nightly-2023-11-10
+resolver: nightly-2023-12-26
 extra-deps: []
 
 allow-newer: false