diff --git a/dist/cleanup/index.js b/dist/cleanup/index.js
index 923b9cc7..2a69d4ef 100644
--- a/dist/cleanup/index.js
+++ b/dist/cleanup/index.js
@@ -87891,7 +87891,7 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
     var _a, _b, _c, _d, _e;
     let javaVersionRegExp;
     if (versionFile == '.tool-versions') {
-        javaVersionRegExp = /^java\s+(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
+        javaVersionRegExp = /^java\s+(\S+)/m;
         core.info(`Using .tool-versions file regx: ${javaVersionRegExp}`);
     }
     else if (versionFile == '.java-version') {
diff --git a/dist/setup/index.js b/dist/setup/index.js
index 095e11fb..b94e2f90 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -125265,7 +125265,7 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
     var _a, _b, _c, _d, _e;
     let javaVersionRegExp;
     if (versionFile == '.tool-versions') {
-        javaVersionRegExp = /^java\s+(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
+        javaVersionRegExp = /^java\s+(\S+)/m;
         core.info(`Using .tool-versions file regx: ${javaVersionRegExp}`);
     }
     else if (versionFile == '.java-version') {
diff --git a/src/util.ts b/src/util.ts
index 29a9c6e1..52248d9a 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -120,7 +120,7 @@ export function getVersionFromFileContent(
 ): string | null {
   let javaVersionRegExp: RegExp;
   if (versionFile == '.tool-versions') {
-    javaVersionRegExp = /^java\s+(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
+    javaVersionRegExp = /^java\s+(\S+)/m;
     core.info(`Using .tool-versions file regx: ${javaVersionRegExp}`);
   } else if (versionFile == '.java-version') {
     javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;