diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 96149b4..873d663 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,10 @@ jobs:
     strategy:
       matrix:
         stack-yaml:
-          - stack.yaml           # ghc-9.0
+          - stack.yaml # ghc-9.6
+          - stack-lts-21.25.yaml # ghc-9.4
+          - stack-lts-20.26.yaml # ghc-9.2
+          - stack-lts-19.1.yaml # ghc-9.0
           - stack-lts-18.28.yaml # ghc-8.10
           - stack-lts-16.31.yaml # ghc-8.8
           - stack-lts-14.27.yaml # ghc-8.6
diff --git a/stack-lts-19.1.yaml b/stack-lts-19.1.yaml
new file mode 100644
index 0000000..f270f10
--- /dev/null
+++ b/stack-lts-19.1.yaml
@@ -0,0 +1 @@
+resolver: lts-19.1
diff --git a/stack.yaml.lock b/stack-lts-19.1.yaml.lock
similarity index 100%
rename from stack.yaml.lock
rename to stack-lts-19.1.yaml.lock
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-lts-21.25.yaml b/stack-lts-21.25.yaml
new file mode 100644
index 0000000..377040a
--- /dev/null
+++ b/stack-lts-21.25.yaml
@@ -0,0 +1 @@
+resolver: lts-21.25
diff --git a/stack-lts-21.25.yaml.lock b/stack-lts-21.25.yaml.lock
new file mode 100644
index 0000000..f823d29
--- /dev/null
+++ b/stack-lts-21.25.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: a81fb3877c4f9031e1325eb3935122e608d80715dc16b586eb11ddbff8671ecd
+    size: 640086
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/25.yaml
+  original: lts-21.25
diff --git a/stack-nightly.yaml b/stack-nightly.yaml
index 9eb59bb..47f954c 100644
--- a/stack-nightly.yaml
+++ b/stack-nightly.yaml
@@ -1 +1 @@
-resolver: nightly-2022-03-30
+resolver: nightly-2024-04-04
diff --git a/stack-nightly.yaml.lock b/stack-nightly.yaml.lock
index 0ed608e..8f30156 100644
--- a/stack-nightly.yaml.lock
+++ b/stack-nightly.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 539378
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/nightly/2022/3/30.yaml
-    sha256: 745431a4c5b78cc93d81e99b2253a1e0eacd4f94e00cf17dab7cc14e665332e3
-  original: nightly-2022-03-30
+    sha256: 31177dd01e2b7801b9347776d892d1e808396c21ab3b60f7f8c96856bdbe5f52
+    size: 622360
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/nightly/2024/4/4.yaml
+  original: nightly-2024-04-04