diff --git a/dist/index.js b/dist/index.js
index c3b64461d..e32197039 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -14558,13 +14558,12 @@ function run() {
             // add label based on title
             const labelTitleRegex = yield getLabelTitleRegex(client, configPath);
             for (const [label, regexs] of labelTitleRegex.entries()) {
-                core.debug(`[labelTitleRegex] processing ${label}`);
-                for (const regex of regexs) {
-                    core.info(`label: ${label}, regex: ${regex}`);
-                    if (prTitle != undefined && regex.test(prTitle)) {
-                        core.info(`in`);
-                        labels.push(label);
-                    }
+                core.debug(`processing ${label}`);
+                if (checkRegexs(prTitle, regexs)) {
+                    labels.push(label);
+                }
+                else if (pullRequest.labels.find(l => l.name === label)) {
+                    labelsToRemove.push(label);
                 }
             }
             // add label based on changed files
@@ -14603,7 +14602,7 @@ function getPrNumber() {
 function getPrTitle() {
     const pullRequest = github.context.payload.pull_request;
     if (!pullRequest) {
-        return undefined;
+        return '';
     }
     return pullRequest.title;
 }
@@ -14679,12 +14678,10 @@ function getLabelTitleRegexMapFromObject(configObject) {
             for (const label in configObject["title"]) {
                 const val = configObject["title"][label];
                 if (typeof val === "string") {
-                    titleRegexs.set(label, [new RegExp(val)]);
-                    core.info(`label: ${label}, ${val}, ${titleRegexs}`);
+                    titleRegexs.set(label, [new RegExp(val, 'i')]);
                 }
                 else if (val instanceof Array) {
-                    core.info(`label: ${label}, ${val}`);
-                    titleRegexs.set(label, val.map(regexStr => new RegExp(regexStr)));
+                    titleRegexs.set(label, val.map(regexStr => new RegExp(regexStr, 'i')));
                 }
                 else {
                     throw Error(`found unexpected type for label ${label} (should be string or array of regex)`);
@@ -14715,6 +14712,14 @@ function checkGlobs(changedFiles, globs) {
     }
     return false;
 }
+function checkRegexs(prTitle, regexs) {
+    for (const regex of regexs) {
+        if (regex.test(prTitle)) {
+            return true;
+        }
+    }
+    return false;
+}
 function isMatch(changedFile, matchers) {
     core.debug(`    matching patterns against file ${changedFile}`);
     for (const matcher of matchers) {