diff --git a/stack-ghc-9.6.2.yaml b/stack-ghc-9.6.2.yaml
index 24572a0a..7563fff0 100644
--- a/stack-ghc-9.6.2.yaml
+++ b/stack-ghc-9.6.2.yaml
@@ -1,5 +1,5 @@
 # Snapshot specification for GHC 9.6.2.
-resolver: nightly-2023-08-16 # GHC 9.6.2
+resolver: nightly-2023-08-29 # GHC 9.6.2
 
 flags:
   hackage-security:
diff --git a/stack.yaml b/stack.yaml
index 8e5134e3..8331c235 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1 +1 @@
-resolver: stack-ghc-9.4.6.yaml
+resolver: stack-ghc-9.4.7.yaml
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 1e19bbad..1e9b5303 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -11,13 +11,6 @@ packages:
       size: 336
   original:
     hackage: aeson-warning-parser-0.1.0@sha256:f2c1c42b73aa35d352060abcbb867c410cbbf57d0cb0fed607bcd1e2a74954ad,1308
-- completed:
-    hackage: casa-client-0.0.2@sha256:1e27a6678c511b3372c4e97ab1a4a9eca4eca8a0a090eac103a1806ce7c8584d,888
-    pantry-tree:
-      sha256: c72d43eca832cc3c9a3074e86b39815de788cda6de966dfae4471194e9abd17d
-      size: 167
-  original:
-    hackage: casa-client-0.0.2@sha256:1e27a6678c511b3372c4e97ab1a4a9eca4eca8a0a090eac103a1806ce7c8584d,888
 - completed:
     hackage: companion-0.1.0@sha256:99f6de52c832d433639232a6d77d33abbca3b3037e49b7db6242fb9f569a8a2b,1093
     pantry-tree:
@@ -104,7 +97,7 @@ packages:
     hackage: tls-1.7.1@sha256:3759864ce4452c31b7740ef181667dd3fdd3d136d7bdc01e0cf5200609973d5c,5566
 snapshots:
 - completed:
-    sha256: 23bb9bb355bfdb1635252e120a29b712f0d5e8a6c6a65c5ab5bd6692f46c438e
-    size: 640457
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/7.yaml
-  original: lts-21.7
+    sha256: 2fc12a405ab6f7eac73eb11a0ca5ccca0e956bd2848db780c140b7406ff9ebb5
+    size: 640035
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/9.yaml
+  original: lts-21.9