diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index f7a768a..6ae4a69 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -54,6 +54,20 @@ jobs:
         path: test/testdata
         only_warn: 1
 
+  test_write:
+    name: Test that writes work
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v7
+    - uses: ./
+      with:
+        path: test/testdata
+        only_warn: 1
+        write_changes: true
+    - name: Check git status
+      run: |
+        if git diff --quiet; then echo "For some reason, no write was performed. This appears to be a bug." && exit 1; else exit 0; fi
+
   codespell:
     name: Check for spelling errors
     runs-on: ubuntu-latest
diff --git a/README.md b/README.md
index 9e9de46..ff824b7 100644
--- a/README.md
+++ b/README.md
@@ -148,3 +148,15 @@ uses: codespell-project/actions-codespell@v2
 with:
   only_warn: 1
 ```
+
+### Parameter: write_changes
+
+Write changes. Note that this will not commit or push; you will need to handle that in the workflow.
+
+This parameter is optional; by default `codespell` will run in "dry-run" mode.
+
+```yml
+uses: codespell-project/actions-codespell@v2
+with:
+  write_changes: 1
+```
diff --git a/action.yml b/action.yml
index 8d6b7b5..43ae2c5 100644
--- a/action.yml
+++ b/action.yml
@@ -46,6 +46,10 @@ inputs:
     description: 'If set, only warn, never error'
     required: false
     default: ''
+  write_changes:
+    description: 'Write fixes automatically'
+    required: false
+    default: ''
 runs:
   using: 'docker'
   image: 'Dockerfile'
diff --git a/entrypoint.sh b/entrypoint.sh
index 10b5a43..5b477bc 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -24,6 +24,10 @@ if [ -n "${INPUT_CHECK_HIDDEN}" ]; then
     echo "Checking hidden"
     command_args="${command_args} --check-hidden"
 fi
+echo "Write changes? '${INPUT_WRITE_CHANGES}'"
+if [ -n "${INPUT_WRITE_CHANGES}" ]; then
+    echo "Writing changes"
+fi
 echo "Config '${INPUT_CONFIG}'"
 if [ "x${INPUT_CONFIG}" != "x" ]; then
     command_args="${command_args} --config ${INPUT_CONFIG}"
@@ -54,7 +58,13 @@ res=`{ { codespell --count ${command_args} ${INPUT_PATH}; echo $? 1>&4; } 1>&5;
 if [ "$res" = "0" ]; then
     echo "Codespell found no problems"
 else
-    echo "Codespell found one or more problems"
+    if [ -n "${INPUT_WRITE_CHANGES}" ]; then
+        echo "Codespell found one or more problems to be fixed"
+        command_args="${command_args} --write-changes"
+        codespell --count ${command_args} ${INPUT_PATH} &> /dev/null
+    else
+        echo "Codespell found one or more problems"
+    fi
 fi
 
 # Remove the matchers, so no other jobs hit them.