diff --git a/lib/bumper.js b/lib/bumper.js
index d97d23c..5b0a559 100644
--- a/lib/bumper.js
+++ b/lib/bumper.js
@@ -243,7 +243,7 @@ class Bumper {
   getLastMergeCommitHash () {
     // Get the commit hash
     return this._getLastMergeCommit().then(mergeCommit => {
-      return Promise.resolve(mergeCommit.match(/(\w*) Merge pull request #/)[1])
+      return Promise.resolve(mergeCommit.match(/(\w*) (Merge ){0,1}pull request #/i)[1])
     })
   }
 
@@ -273,7 +273,7 @@ class Bumper {
   _getLastPr () {
     return this._getLastMergeCommit().then((mergeCommit) => {
       // Get the number from the PR commit
-      const prNumber = mergeCommit.match(/pull request #(\d*)/)[1]
+      const prNumber = mergeCommit.match(/pull request #(\d*)/i)[1]
 
       logger.log(`Fetching PR [${prNumber}]`)
       return this.vcs.getPr(prNumber)
@@ -293,7 +293,7 @@ class Bumper {
       // The commit that represents the merging of the PR will include the text 'pull request #' so
       // we find that one
       const mergeCommit = __.find(commits, (commit) => {
-        return commit.match('pull request #') !== null
+        return commit.match(/pull request #/i) !== null
       })
 
       return Promise.resolve(mergeCommit)