diff --git a/.changeset/skip-when-no-package-json.md b/.changeset/skip-when-no-package-json.md
new file mode 100644
index 0000000..ed7bb0d
--- /dev/null
+++ b/.changeset/skip-when-no-package-json.md
@@ -0,0 +1,5 @@
+---
+"simple-git-hooks": patch
+---
+
+fix: don't crash `postinstall` when the resolved project directory has no package.json — skip instead of throwing an uncaught ENOENT
diff --git a/simple-git-hooks.js b/simple-git-hooks.js
index 9ade519..bf673d4 100644
--- a/simple-git-hooks.js
+++ b/simple-git-hooks.js
@@ -152,6 +152,12 @@ function checkSimpleGitHooksInDependencies(projectRootPath) {
         throw TypeError("Package json path is not a string!")
     }
 
+    // No package.json means we're not in a project that depends on simple-git-hooks
+    // (e.g. postinstall resolved to a directory without one) — skip instead of crashing.
+    if (!fs.existsSync(path.normalize(projectRootPath + '/package.json'))) {
+        return false
+    }
+
     const {packageJsonContent} = _getPackageJson(projectRootPath)
 
     // if simple-git-hooks in dependencies -> note user that he should remove move it to devDeps!
@@ -325,7 +331,7 @@ function _getPackageJson(projectPath = process.cwd()) {
 
     const targetPackageJson = path.normalize(projectPath + '/package.json')
 
-    if (!fs.statSync(targetPackageJson).isFile()) {
+    if (!fs.existsSync(targetPackageJson) || !fs.statSync(targetPackageJson).isFile()) {
         throw Error("Package.json doesn't exist")
     }
 
diff --git a/simple-git-hooks.test.js b/simple-git-hooks.test.js
index 0093217..1bf4ea4 100644
--- a/simple-git-hooks.test.js
+++ b/simple-git-hooks.test.js
@@ -129,6 +129,20 @@ describe("Simple Git Hooks tests", () => {
             simpleGitHooks.checkSimpleGitHooksInDependencies(PROJECT_WITHOUT_SIMPLE_GIT_HOOKS)
         ).toBe(false);
       });
+
+      it("returns false (does not throw) when package.json does not exist", () => {
+        // A directory that exists but has no package.json (the postinstall scenario in #112)
+        const dirWithoutPackageJson = fs.mkdtempSync(
+            path.join(process.cwd(), "_tests", "no_package_json_")
+        );
+        try {
+          expect(
+              simpleGitHooks.checkSimpleGitHooksInDependencies(dirWithoutPackageJson)
+          ).toBe(false);
+        } finally {
+          fs.rmSync(dirWithoutPackageJson, { recursive: true, force: true });
+        }
+      });
     });
   });