diff --git a/.devcontainer/compose.yaml b/.devcontainer/compose.yaml
deleted file mode 100644
index 29382f4..0000000
--- a/.devcontainer/compose.yaml
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "services": {
-    "devcontainer": {
-      "command": "sh -exc 'sleep infinity'",
-      "image": "public.ecr.aws/acilearning/haskell:9.6.2",
-      "init": true,
-      "volumes": [
-        "..:/workspace",
-        "cabal-cache:/home/vscode/.cache/cabal",
-        "cabal-state:/home/vscode/.local/state/cabal"
-      ],
-      "working_dir": "/workspace"
-    }
-  },
-  "volumes": {
-    "cabal-cache": null,
-    "cabal-state": {
-      "external": true
-    }
-  }
-}
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
deleted file mode 100644
index b200a0e..0000000
--- a/.devcontainer/devcontainer.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "customizations": {
-    "vscode": {
-      "extensions": [
-        "taylorfausak.purple-yolk"
-      ]
-    }
-  },
-  "dockerComposeFile": "compose.yaml",
-  "initializeCommand": "docker volume create cabal-state",
-  "postCreateCommand": "cabal update",
-  "service": "devcontainer",
-  "workspaceFolder": "/workspace"
-}
diff --git a/.github/dependabot.yaml b/.github/dependabot.yml
similarity index 100%
rename from .github/dependabot.yaml
rename to .github/dependabot.yml
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..3105f32
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,106 @@
+jobs:
+  build:
+    name: GHC ${{ matrix.ghc }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - run: mkdir artifact
+      - id: haskell
+        uses: haskell-actions/setup@v2
+        with:
+          ghc-version: ${{ matrix.ghc }}
+      - run: ghc-pkg list
+      - run: cabal sdist --output-dir artifact
+      - run: cabal configure --enable-tests --flags=pedantic --jobs
+      - run: cat cabal.project.local
+      - run: cp cabal.project.local artifact
+      - run: cabal freeze
+      - run: cat cabal.project.freeze
+      - run: cp cabal.project.freeze artifact
+      - run: cabal outdated --v2-freeze-file
+      - uses: actions/cache@v4
+        with:
+          key: ${{ matrix.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
+          path: ${{ steps.haskell.outputs.cabal-store }}
+          restore-keys: ${{ matrix.os }}-${{ matrix.ghc }}-
+      - run: cabal build --only-download
+      - run: cabal build --only-dependencies
+      - run: cabal build
+      - run: tar --create --file artifact.tar --verbose artifact
+      - uses: actions/upload-artifact@v4
+        with:
+          name: flow-${{ github.sha }}-${{ matrix.os }}-${{ matrix.ghc }}
+          path: artifact.tar
+      - run: cabal run -- flow-test-suite --randomize --strict
+    strategy:
+      matrix:
+        include:
+          - ghc: '9.10'
+            os: macos-13
+          - ghc: '9.10'
+            os: macos-14
+          - ghc: 9.6
+            os: ubuntu-22.04
+          - ghc: 9.8
+            os: ubuntu-22.04
+          - ghc: '9.10'
+            os: ubuntu-22.04
+          - ghc: '9.10'
+            os: windows-2022
+  cabal:
+    name: Cabal
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: cabal check
+  gild:
+    name: Gild
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: tfausak/cabal-gild-setup-action@v2
+      - run: cabal-gild --input flow.cabal --mode check
+  hlint:
+    name: HLint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: haskell-actions/hlint-setup@9e09cc3653fc13702000a35f638a27b064adfbbe
+      - uses: haskell-actions/hlint-run@v2
+        with:
+          fail-on: status
+  ormolu:
+    name: Ormolu
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: haskell-actions/run-ormolu@v15
+  release:
+    if: ${{ github.event_name == 'release' }}
+    name: Release
+    needs: build
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: flow-${{ github.sha }}-ubuntu-22.04-9.10
+      - run: tar --extract --file artifact.tar --verbose
+      - uses: softprops/action-gh-release@v2
+        with:
+          files: artifact/flow-${{ github.event.release.tag_name }}.tar.gz
+      - run: cabal upload --publish --username '${{ secrets.HACKAGE_USERNAME }}' --password '${{ secrets.HACKAGE_PASSWORD }}' artifact/flow-${{ github.event.release.tag_name }}.tar.gz
+name: CI
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  release:
+    types:
+      - created
+  schedule:
+    - cron: 0 0 * * 1
diff --git a/.github/workflows/workflow.yaml b/.github/workflows/workflow.yaml
deleted file mode 100644
index cdd7906..0000000
--- a/.github/workflows/workflow.yaml
+++ /dev/null
@@ -1,199 +0,0 @@
-{
-  "jobs": {
-    "build": {
-      "name": "Build on ${{ matrix.platform }} with GHC ${{ matrix.ghc }}",
-      "runs-on": "${{ matrix.platform }}-${{ matrix.version }}",
-      "steps": [
-        {
-          "uses": "actions/checkout@v4"
-        },
-        {
-          "run": "mkdir artifact"
-        },
-        {
-          "id": "artifact",
-          "run": "echo 'directory=artifact/${{ matrix.platform }}-${{ matrix.ghc }}' >> $GITHUB_OUTPUT",
-          "shell": "bash"
-        },
-        {
-          "run": "mkdir ${{ steps.artifact.outputs.directory }}"
-        },
-        {
-          "id": "haskell",
-          "uses": "haskell-actions/setup@v2",
-          "with": {
-            "cabal-version": "3.10.2.1",
-            "ghc-version": "${{ matrix.ghc }}"
-          }
-        },
-        {
-          "run": "cabal sdist --output-dir ${{ steps.artifact.outputs.directory }}"
-        },
-        {
-          "run": "cabal configure --enable-optimization=2 --flags pedantic --jobs"
-        },
-        {
-          "run": "cat cabal.project.local"
-        },
-        {
-          "run": "cp cabal.project.local ${{ steps.artifact.outputs.directory }}"
-        },
-        {
-          "run": "cabal freeze"
-        },
-        {
-          "run": "cat cabal.project.freeze"
-        },
-        {
-          "run": "cp cabal.project.freeze ${{ steps.artifact.outputs.directory }}"
-        },
-        {
-          "run": "cabal outdated --v2-freeze-file cabal.project.freeze"
-        },
-        {
-          "uses": "actions/cache@v3",
-          "with": {
-            "key": "${{ matrix.platform }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}",
-            "path": "${{ steps.haskell.outputs.cabal-store }}",
-            "restore-keys": "${{ matrix.platform }}-${{ matrix.ghc }}-"
-          }
-        },
-        {
-          "run": "cabal build --only-download"
-        },
-        {
-          "run": "cabal build --only-dependencies"
-        },
-        {
-          "run": "cabal build"
-        },
-        {
-          "uses": "actions/upload-artifact@v3",
-          "with": {
-            "name": "flow-${{ github.sha }}",
-            "path": "artifact"
-          }
-        },
-        {
-          "run": "cabal run flow-test-suite"
-        }
-      ],
-      "strategy": {
-        "matrix": {
-          "include": [
-            {
-              "ghc": "9.8.1",
-              "platform": "macos",
-              "version": "12"
-            },
-            {
-              "ghc": "9.4.8",
-              "platform": "ubuntu",
-              "version": "22.04"
-            },
-            {
-              "ghc": "9.6.4",
-              "platform": "ubuntu",
-              "version": "22.04"
-            },
-            {
-              "ghc": "9.8.1",
-              "platform": "ubuntu",
-              "version": "22.04"
-            },
-            {
-              "extension": ".exe",
-              "ghc": "9.8.1",
-              "platform": "windows",
-              "version": "2022"
-            }
-          ]
-        }
-      }
-    },
-    "cabal": {
-      "name": "Cabal",
-      "runs-on": "ubuntu-22.04",
-      "steps": [
-        {
-          "uses": "actions/checkout@v4"
-        },
-        {
-          "run": "cabal check"
-        }
-      ]
-    },
-    "hlint": {
-      "name": "HLint",
-      "runs-on": "ubuntu-22.04",
-      "steps": [
-        {
-          "uses": "actions/checkout@v4"
-        },
-        {
-          "uses": "haskell-actions/hlint-setup@v2",
-          "with": {
-            "version": 3.5
-          }
-        },
-        {
-          "uses": "haskell-actions/hlint-run@v2",
-          "with": {
-            "fail-on": "status"
-          }
-        }
-      ]
-    },
-    "ormolu": {
-      "name": "Ormolu",
-      "runs-on": "ubuntu-22.04",
-      "steps": [
-        {
-          "uses": "actions/checkout@v4"
-        },
-        {
-          "uses": "haskell-actions/run-ormolu@v15"
-        }
-      ]
-    },
-    "release": {
-      "if": "github.event_name == 'release'",
-      "name": "Release",
-      "needs": "build",
-      "runs-on": "ubuntu-22.04",
-      "steps": [
-        {
-          "uses": "actions/download-artifact@v3",
-          "with": {
-            "name": "flow-${{ github.sha }}",
-            "path": "artifact"
-          }
-        },
-        {
-          "uses": "svenstaro/upload-release-action@v2",
-          "with": {
-            "asset_name": "flow-${{ github.event.release.tag_name }}.tar.gz",
-            "file": "artifact/ubuntu-9.8.1/flow-${{ github.event.release.tag_name }}.tar.gz"
-          }
-        },
-        {
-          "run": "cabal upload --publish --username '${{ secrets.HACKAGE_USERNAME }}' --password '${{ secrets.HACKAGE_PASSWORD }}' artifact/ubuntu-9.8.1/flow-${{ github.event.release.tag_name }}.tar.gz"
-        }
-      ]
-    }
-  },
-  "name": "Workflow",
-  "on": {
-    "push": null,
-    "release": {
-      "types": [
-        "created"
-      ]
-    },
-    "schedule": [
-      {
-        "cron": "0 0 * * 1"
-      }
-    ]
-  }
-}
diff --git a/CHANGELOG.markdown b/CHANGELOG.md
similarity index 100%
rename from CHANGELOG.markdown
rename to CHANGELOG.md
diff --git a/LICENSE.markdown b/LICENSE.txt
similarity index 100%
rename from LICENSE.markdown
rename to LICENSE.txt
diff --git a/README.markdown b/README.md
similarity index 84%
rename from README.markdown
rename to README.md
index 7599315..878f1c1 100644
--- a/README.markdown
+++ b/README.md
@@ -1,8 +1,7 @@
 # [Flow][]
 
-[![Workflow](https://github.com/tfausak/flow/actions/workflows/workflow.yaml/badge.svg)](https://github.com/tfausak/flow/actions/workflows/workflow.yaml)
-[![Hackage](https://img.shields.io/hackage/v/flow)](https://hackage.haskell.org/package/flow)
-[![Stackage](https://www.stackage.org/package/flow/badge/nightly?label=stackage)](https://www.stackage.org/package/flow)
+[![CI](https://github.com/tfausak/flow/actions/workflows/ci.yml/badge.svg)](https://github.com/tfausak/flow/actions/workflows/ci.yml)
+[![Hackage](https://badgen.net/hackage/v/flow)](https://hackage.haskell.org/package/flow)
 
 Write more understandable Haskell.
 
diff --git a/flow.cabal b/flow.cabal
index e85800b..551480e 100644
--- a/flow.cabal
+++ b/flow.cabal
@@ -1,15 +1,15 @@
 cabal-version: 2.2
-
 name: flow
 version: 2.0.0.4
-
 synopsis: Write more understandable Haskell.
 description: Flow provides operators for writing more understandable Haskell.
-
 build-type: Simple
 category: Combinators, Functions, Utility
-extra-source-files: CHANGELOG.markdown README.markdown
-license-file: LICENSE.markdown
+extra-doc-files:
+  CHANGELOG.md
+  README.md
+
+license-file: LICENSE.txt
 license: MIT
 maintainer: Taylor Fausak
 
@@ -23,8 +23,7 @@ flag pedantic
   manual: True
 
 common library
-  build-depends:
-    , base >= 4.16.0 && < 4.20
+  build-depends: base ^>=4.18.0.0 || ^>=4.19.0.0 || ^>=4.20.0.0
   default-language: Haskell2010
   ghc-options:
     -Weverything
@@ -40,24 +39,21 @@ common library
 
 common executable
   import: library
-
   build-depends: flow
   ghc-options:
     -rtsopts
     -threaded
-    -Wno-unused-packages
 
 library
   import: library
-
   exposed-modules: Flow
   hs-source-dirs: source/library
 
 test-suite flow-test-suite
   import: executable
-
   build-depends:
-    , HUnit >= 1.6.1 && < 1.7
+    HUnit ^>=1.6.2.0
+
   hs-source-dirs: source/test-suite
   main-is: Main.hs
   type: exitcode-stdio-1.0