diff --git a/src/ResponseCache.php b/src/ResponseCache.php
index 65403ed..75e53e9 100644
--- a/src/ResponseCache.php
+++ b/src/ResponseCache.php
@@ -323,7 +323,7 @@ protected function replaceBinding(string $tag, Request $request): string
 
             // Replace the matched expression (`{foo}`) with the value found in
             // the request inside the tag
-            $tag = str_replace($match, $value, $tag);
+            $tag = str_replace($match, (string) $value, $tag);
         }
 
         return $this->resolvedTags[$tag] = $tag;
diff --git a/tests/Feature/TagBindingTest.php b/tests/Feature/TagBindingTest.php
new file mode 100644
index 0000000..49fdfbf
--- /dev/null
+++ b/tests/Feature/TagBindingTest.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Matchory\ResponseCache\Tests\Feature;
+
+use Matchory\ResponseCache\Facades\ResponseCache;
+
+use function beforeEach;
+use function it;
+use function test;
+
+beforeEach(function () {
+    $this->app['cache']->flush();
+});
+
+it('resolves bound models with integer keys in tags', function () {
+    test()->get('/models/1')->assertContent('1');
+    test()->get('/models/2')->assertContent('2');
+
+    ResponseCache::flush(['models.2']);
+
+    test()->get('/models/1')->assertContent('1');
+    test()->get('/models/2')->assertContent('3');
+});
diff --git a/tests/TestCase.php b/tests/TestCase.php
index d614fb5..f5305eb 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -2,6 +2,8 @@
 
 namespace Matchory\ResponseCache\Tests;
 
+use Illuminate\Contracts\Routing\UrlRoutable;
+use Illuminate\Routing\Middleware\SubstituteBindings;
 use InvalidArgumentException;
 use Matchory\ResponseCache\Http\Middleware\BypassCache;
 use Matchory\ResponseCache\Http\Middleware\CacheResponse;
@@ -39,6 +41,39 @@ protected function defineRoutes($router): void
             ->middleware(CacheResponse::class)
             ->middleware(BypassCache::class)
             ->name('bypass');
+
+        // Binds like an Eloquent model with an integer key
+        $router->bind('model', fn(string $value) => new class ((int) $value) implements UrlRoutable {
+            public function __construct(private readonly int $key) {}
+
+            public function getRouteKey(): int
+            {
+                return $this->key;
+            }
+
+            public function getRouteKeyName(): string
+            {
+                return 'id';
+            }
+
+            public function resolveRouteBinding($value, $field = null): ?self
+            {
+                return null;
+            }
+
+            public function resolveChildRouteBinding($childType, $value, $field): ?self
+            {
+                return null;
+            }
+        });
+        $router
+            ->get('/models/{model}', function () {
+                static $i = 0;
+
+                return ++$i;
+            })
+            ->middleware([SubstituteBindings::class, CacheResponse::class . ':models.{model}'])
+            ->name('models');
     }
 
     protected function getPackageProviders($app): array