diff --git a/lib/manager/composer/extract.ts b/lib/manager/composer/extract.ts
index b9666c3c30..e0faa9fed4 100644
--- a/lib/manager/composer/extract.ts
+++ b/lib/manager/composer/extract.ts
@@ -6,7 +6,12 @@ import { SkipReason } from '../../types';
 import { readLocalFile } from '../../util/fs';
 import { api as semverComposer } from '../../versioning/composer';
 import type { PackageDependency, PackageFile } from '../types';
-import type { ComposerConfig, ComposerLock, Repo } from './types';
+import type {
+  ComposerConfig,
+  ComposerLock,
+  ComposerManagerData,
+  Repo,
+} from './types';
 import { extractContraints } from './utils';
 
 /**
@@ -176,8 +181,11 @@ export async function extractPackageFile(
     return null;
   }
   res.deps = deps;
-  if (composerJson.type) {
-    res.managerData = { composerJsonType: composerJson.type };
+  if (is.string(composerJson.type)) {
+    const managerData: ComposerManagerData = {
+      composerJsonType: composerJson.type,
+    };
+    res.managerData = managerData;
   }
   return res;
 }
diff --git a/lib/manager/composer/range.ts b/lib/manager/composer/range.ts
index 7b53302ef9..65212e27cd 100644
--- a/lib/manager/composer/range.ts
+++ b/lib/manager/composer/range.ts
@@ -1,6 +1,7 @@
 import { logger } from '../../logger';
 import type { RangeStrategy } from '../../types';
 import type { RangeConfig } from '../types';
+import { ComposerManagerData } from './types';
 
 export function getRangeStrategy(config: RangeConfig): RangeStrategy {
   const {
@@ -10,7 +11,7 @@ export function getRangeStrategy(config: RangeConfig): RangeStrategy {
     currentValue,
     rangeStrategy,
   } = config;
-  const { composerJsonType } = managerData;
+  const { composerJsonType } = managerData as ComposerManagerData;
   const isComplexRange = currentValue?.includes(' || ');
   if (rangeStrategy === 'bump' && isComplexRange) {
     logger.debug(
diff --git a/lib/manager/composer/types.ts b/lib/manager/composer/types.ts
index 599bbb8693..2b421f7edc 100644
--- a/lib/manager/composer/types.ts
+++ b/lib/manager/composer/types.ts
@@ -30,3 +30,7 @@ export interface ComposerLock {
   packages?: ComposerLockPackage[];
   'packages-dev'?: ComposerLockPackage[];
 }
+
+export interface ComposerManagerData {
+  composerJsonType?: string;
+}
diff --git a/lib/manager/types.ts b/lib/manager/types.ts
index 0a6deff94e..94ad3a8ed5 100644
--- a/lib/manager/types.ts
+++ b/lib/manager/types.ts
@@ -59,7 +59,6 @@ export interface PackageUpdateConfig {
 }
 
 export interface RangeConfig<T = Record<string, any>> extends ManagerData<T> {
-  composerJsonType?: 'composer-plugin' | 'library' | 'metapackage' | 'project';
   currentValue?: string;
   depName?: string;
   depType?: string;
diff --git a/lib/util/cache/repository/index.ts b/lib/util/cache/repository/index.ts
index ab07f46d9e..830d4a57b4 100644
--- a/lib/util/cache/repository/index.ts
+++ b/lib/util/cache/repository/index.ts
@@ -9,7 +9,7 @@ import type { PackageFile } from '../../../manager/types';
 import type { RepoInitConfig } from '../../../workers/repository/init/common';
 
 // Increment this whenever there could be incompatibilities between old and new cache structure
-export const CACHE_REVISION = 5;
+export const CACHE_REVISION = 6;
 
 export interface BaseBranchCache {
   sha: string; // branch commit sha