diff --git a/.changeset/great-rules-march.md b/.changeset/great-rules-march.md
new file mode 100644
index 0000000000..eb8d901910
--- /dev/null
+++ b/.changeset/great-rules-march.md
@@ -0,0 +1,6 @@
+---
+'@backstage/backend-common': patch
+'@backstage/cli': patch
+---
+
+Remove use of deprecated trimLeft/trimRight
diff --git a/packages/backend-common/src/middleware/requestLoggingHandler.ts b/packages/backend-common/src/middleware/requestLoggingHandler.ts
index fa114411e1..ef6be761ac 100644
--- a/packages/backend-common/src/middleware/requestLoggingHandler.ts
+++ b/packages/backend-common/src/middleware/requestLoggingHandler.ts
@@ -34,7 +34,7 @@ export function requestLoggingHandler(logger?: Logger): RequestHandler {
   return morgan('combined', {
     stream: {
       write(message: String) {
-        actualLogger.info(message.trimRight());
+        actualLogger.info(message.trimEnd());
       },
     },
   });
diff --git a/packages/cli/src/commands/repo/lint.ts b/packages/cli/src/commands/repo/lint.ts
index 19e034aa7d..61d85b3773 100644
--- a/packages/cli/src/commands/repo/lint.ts
+++ b/packages/cli/src/commands/repo/lint.ts
@@ -101,7 +101,7 @@ export async function command(opts: OptionValues): Promise<void> {
     if (resultText) {
       console.log();
       console.log(chalk.red(`Lint failed in ${relativeDir}:`));
-      console.log(resultText.trimLeft());
+      console.log(resultText.trimStart());
 
       failed = true;
     }
diff --git a/packages/e2e-test/src/lib/helpers.ts b/packages/e2e-test/src/lib/helpers.ts
index ccedf52ade..b3fd665fd2 100644
--- a/packages/e2e-test/src/lib/helpers.ts
+++ b/packages/e2e-test/src/lib/helpers.ts
@@ -31,7 +31,7 @@ export function spawnPiped(cmd: string[], options?: SpawnOptions) {
     return (data: Buffer) => {
       const prefixedMsg = data
         .toString('utf8')
-        .trimRight()
+        .trimEnd()
         .replace(/^/gm, prefix);
       stream.write(`${prefixedMsg}\n`, 'utf8');
     };