diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e903541..f4c3546 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,8 +16,9 @@ jobs:
     strategy:
       matrix:
         stack-yaml:
-          - stack-nightly.yaml     # ghc-9.4 + hoauth2-2.8.0
-          - stack.yaml             # ghc-9.2
+          - stack-nightly.yaml     # ghc-9.6 + hoauth2-2.8.1
+          - stack.yaml             # ghc-9.4
+          - stack-lts-20.26.yaml   # ghc-9.2
           - stack-lts-19.33.yaml   # ghc-9.0
           - stack-lts-18.28.yaml   # ghc-8.10
           - stack-lts-16.31.yaml   # ghc-8.8
diff --git a/stack-lts-20.26.yaml b/stack-lts-20.26.yaml
new file mode 100644
index 0000000..fc9172f
--- /dev/null
+++ b/stack-lts-20.26.yaml
@@ -0,0 +1 @@
+resolver: lts-20.26
diff --git a/stack-lts-20.26.yaml.lock b/stack-lts-20.26.yaml.lock
new file mode 100644
index 0000000..ea5a850
--- /dev/null
+++ b/stack-lts-20.26.yaml.lock
@@ -0,0 +1,12 @@
+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages: []
+snapshots:
+- completed:
+    sha256: 5a59b2a405b3aba3c00188453be172b85893cab8ebc352b1ef58b0eae5d248a2
+    size: 650475
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/26.yaml
+  original: lts-20.26
diff --git a/stack-nightly.yaml b/stack-nightly.yaml
index 4a3223f..078391e 100644
--- a/stack-nightly.yaml
+++ b/stack-nightly.yaml
@@ -1,3 +1 @@
-resolver: nightly-2023-04-05
-extra-deps:
-  - hoauth2-2.8.0
+resolver: nightly-2023-08-01
diff --git a/stack-nightly.yaml.lock b/stack-nightly.yaml.lock
index b2f0538..589cbde 100644
--- a/stack-nightly.yaml.lock
+++ b/stack-nightly.yaml.lock
@@ -3,17 +3,10 @@
 # For more information, please see the documentation at:
 #   https://docs.haskellstack.org/en/stable/lock_files
 
-packages:
-- completed:
-    hackage: hoauth2-2.8.0@sha256:ead0fa524656b42baca8a3c6aef5ac245b28d2923d48ac574d74fc434a61a8ab,2647
-    pantry-tree:
-      sha256: 98ac2693937dc8ccaa5508c7bcd8111e15175603ecba75fec27ab604dbf891d5
-      size: 996
-  original:
-    hackage: hoauth2-2.8.0
+packages: []
 snapshots:
 - completed:
-    sha256: 91195434dbc6e4d745301c865e94b798e771db5539625571a19adf6ed4c5e39e
-    size: 600986
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/nightly/2023/4/5.yaml
-  original: nightly-2023-04-05
+    sha256: 05d50b875e9273b40eef9f5f7da82ec1c7728c31d99eada5bf79407399108686
+    size: 598883
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/nightly/2023/8/1.yaml
+  original: nightly-2023-08-01
diff --git a/stack.yaml b/stack.yaml
index a34fe7e..c7f72d1 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1 +1 @@
-resolver: lts-20.17
+resolver: lts-21.5
diff --git a/stack.yaml.lock b/stack.yaml.lock
index ca0f44a..8b6e093 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    sha256: 14ca51a9a597c32dd7804c10d079feea3d0ae40c5fbbb346cbd67b3ae49f6d01
-    size: 649598
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/17.yaml
-  original: lts-20.17
+    sha256: 1d5fb7e344e76dd2c8958e3061d4e4dabb50a1355e6ff02e7d0e4f754c0adf47
+    size: 640015
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/5.yaml
+  original: lts-21.5