diff --git a/dist/post_run/index.js b/dist/post_run/index.js
index 05c2b46..28a0666 100644
--- a/dist/post_run/index.js
+++ b/dist/post_run/index.js
@@ -6020,7 +6020,7 @@ class HttpClient {
         }
         const usingSsl = parsedUrl.protocol === 'https:';
         proxyAgent = new undici_1.ProxyAgent(Object.assign({ uri: proxyUrl.href, pipelining: !this._keepAlive ? 0 : 1 }, ((proxyUrl.username || proxyUrl.password) && {
-            token: `${proxyUrl.username}:${proxyUrl.password}`
+            token: `Basic ${Buffer.from(`${proxyUrl.username}:${proxyUrl.password}`).toString('base64')}`
         })));
         this._proxyAgentDispatcher = proxyAgent;
         if (usingSsl && this._ignoreSslError) {
diff --git a/dist/run/index.js b/dist/run/index.js
index 615872f..07025c2 100644
--- a/dist/run/index.js
+++ b/dist/run/index.js
@@ -6020,7 +6020,7 @@ class HttpClient {
         }
         const usingSsl = parsedUrl.protocol === 'https:';
         proxyAgent = new undici_1.ProxyAgent(Object.assign({ uri: proxyUrl.href, pipelining: !this._keepAlive ? 0 : 1 }, ((proxyUrl.username || proxyUrl.password) && {
-            token: `${proxyUrl.username}:${proxyUrl.password}`
+            token: `Basic ${Buffer.from(`${proxyUrl.username}:${proxyUrl.password}`).toString('base64')}`
         })));
         this._proxyAgentDispatcher = proxyAgent;
         if (usingSsl && this._ignoreSslError) {