diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7387d8cab..5f5c29319 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [3.4.3](https://github.com/amannn/action-semantic-pull-request/compare/v3.4.2...v3.4.3) (2021-10-26)
+
+
+### Bug Fixes
+
+* Consider merge commits for single commit validation ([#127](https://github.com/amannn/action-semantic-pull-request/issues/127)) ([1b347f7](https://github.com/amannn/action-semantic-pull-request/commit/1b347f79d6518f5d0190913abf7815286f490f53)), closes [#108](https://github.com/amannn/action-semantic-pull-request/issues/108) [#108](https://github.com/amannn/action-semantic-pull-request/issues/108)
+
 ### [3.4.2](https://github.com/amannn/action-semantic-pull-request/compare/v3.4.1...v3.4.2) (2021-08-16)
 
 
diff --git a/dist/index.js b/dist/index.js
index 5ed2f0263..2f3e97077 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -33345,7 +33345,17 @@ module.exports = async function run() {
             per_page: 2
           });
 
-          if (commits.length === 1) {
+          // GitHub does not count merge commits when deciding whether to use
+          // the PR title or a commit message for the squash commit message.
+          const nonMergeCommits = commits.filter(
+            (commit) => !commit.message.startsWith('Merge branch')
+          );
+
+          // If there is only one (non merge) commit present, GitHub will use
+          // that commit rather than the PR title for the title of a squash
+          // commit. To make sure a semantic title is used for the squash
+          // commit, we need to validate the commit title.
+          if (nonMergeCommits.length === 1) {
             try {
               await validatePrTitle(commits[0].commit.message, {
                 types,