diff --git a/packages/core/package.json b/packages/core/package.json
index 978815a3fd..cd7cc73158 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -69,7 +69,7 @@
     "inquirer": "~8.2.0",
     "lodash.flatmap": "~4.5.0",
     "lodash.groupby": "~4.6.0",
-    "log4js": "~6.2.1",
+    "log4js": "~6.4.1",
     "minimatch": "~3.0.4",
     "mkdirp": "~1.0.3",
     "mutation-testing-elements": "1.7.8",
diff --git a/packages/core/src/logging/log-utils.ts b/packages/core/src/logging/log-utils.ts
index 0a24144ae1..0c56a92681 100644
--- a/packages/core/src/logging/log-utils.ts
+++ b/packages/core/src/logging/log-utils.ts
@@ -7,7 +7,7 @@ import log4js from 'log4js';
  * @param b other log level
  */
 export function minLevel(a: LogLevel, b: LogLevel): LogLevel {
-  if (log4js.levels.getLevel(b).isGreaterThanOrEqualTo(log4js.levels.getLevel(a))) {
+  if (log4js.levels.getLevel(b, log4js.levels.INFO).isGreaterThanOrEqualTo(log4js.levels.getLevel(a, log4js.levels.INFO))) {
     return a;
   } else {
     return b;
diff --git a/packages/core/test/helpers/producers.ts b/packages/core/test/helpers/producers.ts
index 7e31fea01a..6e67cd5c5b 100644
--- a/packages/core/test/helpers/producers.ts
+++ b/packages/core/test/helpers/producers.ts
@@ -67,6 +67,7 @@ export function createCheckerPoolMock(): sinon.SinonStubbedInstance<I<Pool<Check
 
 export const logger = (): Mock<Logger> => {
   return {
+    category: 'foo-category',
     _log: sinon.stub(),
     addContext: sinon.stub(),
     clearContext: sinon.stub(),