diff --git a/__tests__/util.test.ts b/__tests__/util.test.ts
index 9c943c2f..c96e6aeb 100644
--- a/__tests__/util.test.ts
+++ b/__tests__/util.test.ts
@@ -2,6 +2,7 @@ import * as cache from '@actions/cache';
 import * as core from '@actions/core';
 import {
   convertVersionToSemver,
+  getVersionFromFileContent,
   isVersionSatisfies,
   isCacheFeatureAvailable,
   isGhes
@@ -82,6 +83,22 @@ describe('convertVersionToSemver', () => {
   });
 });
 
+describe('getVersionFromFileContent', () => {
+  describe('.sdkmanrc', () => {
+    it.each([
+      ['java=11.0.20.1-tem', '11.0.20'],
+      ['java = 11.0.20.1-tem', '11.0.20'],
+      ['java=11.0.20.1-tem # a comment in sdkmanrc', '11.0.20'],
+      ['java=11.0.20.1-tem\n#java=21.0.20.1-tem\n', '11.0.20'], // choose first match
+      ['java=11.0.20.1-tem\njava=21.0.20.1-tem\n', '11.0.20'], // choose first match
+      ['#java=11.0.20.1-tem\njava=21.0.20.1-tem\n', '21.0.20'] // first one is 'commented' in .sdkmanrc
+    ])('parsing %s should return %s', (content: string, expected: string) => {
+      const actual = getVersionFromFileContent(content, 'openjdk', '.sdkmanrc');
+      expect(actual).toBe(expected);
+    });
+  });
+});
+
 describe('isGhes', () => {
   const pristineEnv = process.env;
 
diff --git a/dist/cleanup/index.js b/dist/cleanup/index.js
index 79ad0b5f..063375a4 100644
--- a/dist/cleanup/index.js
+++ b/dist/cleanup/index.js
@@ -94706,6 +94706,9 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
         javaVersionRegExp =
             /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
     }
+    else if (versionFileName == '.sdkmanrc') {
+        javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
+    }
     else {
         javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
     }
diff --git a/dist/setup/index.js b/dist/setup/index.js
index c4e8ec9e..2efeb81b 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -132741,6 +132741,9 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
         javaVersionRegExp =
             /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
     }
+    else if (versionFileName == '.sdkmanrc') {
+        javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
+    }
     else {
         javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
     }
diff --git a/src/util.ts b/src/util.ts
index 9e5f2f66..7aafee07 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -134,6 +134,8 @@ export function getVersionFromFileContent(
   if (versionFileName == '.tool-versions') {
     javaVersionRegExp =
       /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
+  } else if (versionFileName == '.sdkmanrc') {
+    javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
   } else {
     javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
   }