diff --git a/example/json/consumer/tests/Service/ConsumerServiceMultipleInteractionsTest.php b/example/json/consumer/tests/Service/ConsumerServiceMultipleInteractionsTest.php
index 54b29814..c1bf6223 100644
--- a/example/json/consumer/tests/Service/ConsumerServiceMultipleInteractionsTest.php
+++ b/example/json/consumer/tests/Service/ConsumerServiceMultipleInteractionsTest.php
@@ -48,6 +48,13 @@ public function testGetHelloString()
         }
         $builder = new InteractionBuilder($config);
         $builder
+            ->given('User exist', [
+                'user' => [
+                    'name' => 'Bob',
+                    'id' => '0c447df2-20ae-469d-ae52-b1258c06dabe',
+                    'dob' => '1993-06-22',
+                ],
+            ])
             ->uponReceiving('A get request to /hello/{name}')
             ->with($request)
             ->willRespondWith($response, false); // Don't start the mock server yet, because there will me more interactions.
diff --git a/example/json/pacts/jsonConsumer-jsonProvider.json b/example/json/pacts/jsonConsumer-jsonProvider.json
index 78989191..ec811c63 100644
--- a/example/json/pacts/jsonConsumer-jsonProvider.json
+++ b/example/json/pacts/jsonConsumer-jsonProvider.json
@@ -54,9 +54,51 @@
                 }
               ]
             }
-          },
-          "header": {},
-          "status": {}
+          }
+        },
+        "status": 200
+      }
+    },
+    {
+      "description": "A get request to /hello/{name}",
+      "providerStates": [
+        {
+          "name": "User exist",
+          "params": {
+            "user": {
+              "dob": "1993-06-22",
+              "id": "0c447df2-20ae-469d-ae52-b1258c06dabe",
+              "name": "Bob"
+            }
+          }
+        }
+      ],
+      "request": {
+        "headers": {
+          "Content-Type": "application/json"
+        },
+        "method": "GET",
+        "path": "/hello/Bob"
+      },
+      "response": {
+        "body": {
+          "message": "Hello, Bob"
+        },
+        "headers": {
+          "Content-Type": "application/json"
+        },
+        "matchingRules": {
+          "body": {
+            "$.message": {
+              "combine": "AND",
+              "matchers": [
+                {
+                  "match": "regex",
+                  "regex": "(Hello, )[A-Za-z]+"
+                }
+              ]
+            }
+          }
         },
         "status": 200
       }
diff --git a/src/PhpPact/Consumer/AbstractMessageBuilder.php b/src/PhpPact/Consumer/AbstractMessageBuilder.php
index 17c4fc36..5fe13e42 100644
--- a/src/PhpPact/Consumer/AbstractMessageBuilder.php
+++ b/src/PhpPact/Consumer/AbstractMessageBuilder.php
@@ -15,7 +15,7 @@ public function __construct()
 
     /**
      * @param string                 $name      what is given to the request
-     * @param array<string, string>  $params    for that request
+     * @param array<string, mixed>  $params    for that request
      * @param bool                   $overwrite clear pass states completely and start this array
      */
     public function given(string $name, array $params = [], bool $overwrite = false): self
diff --git a/src/PhpPact/Consumer/InteractionBuilder.php b/src/PhpPact/Consumer/InteractionBuilder.php
index 356df997..1cc9fd08 100644
--- a/src/PhpPact/Consumer/InteractionBuilder.php
+++ b/src/PhpPact/Consumer/InteractionBuilder.php
@@ -31,7 +31,7 @@ public function newInteraction(): void
 
     /**
      * @param string $providerState what is given to the request
-     * @param array<string, string>  $params    for that request
+     * @param array<string, mixed>  $params    for that request
      * @param bool   $overwrite clear pass states completely and start this array
      */
     public function given(string $providerState, array $params = [], bool $overwrite = false): self
diff --git a/src/PhpPact/Consumer/Model/ProviderState.php b/src/PhpPact/Consumer/Model/ProviderState.php
index acfa571d..05ef1104 100644
--- a/src/PhpPact/Consumer/Model/ProviderState.php
+++ b/src/PhpPact/Consumer/Model/ProviderState.php
@@ -30,12 +30,12 @@ public function getParams(): array
     }
 
     /**
-     * @param array<string, string> $params
+     * @param array<string, mixed> $params
      */
     public function setParams(array $params = []): void
     {
         foreach ($params as $key => $value) {
-            $this->addParam($key, $value);
+            $this->addParam($key, is_string($value) ? $value : json_encode($value, JSON_THROW_ON_ERROR));
         }
     }
 
diff --git a/src/PhpPact/Consumer/Model/ProviderStates.php b/src/PhpPact/Consumer/Model/ProviderStates.php
index 09c09ece..61c7040a 100644
--- a/src/PhpPact/Consumer/Model/ProviderStates.php
+++ b/src/PhpPact/Consumer/Model/ProviderStates.php
@@ -19,7 +19,7 @@ public function getProviderStates(): array
 
     /**
      * @param string $name
-     * @param array<string, string> $params
+     * @param array<string, mixed> $params
      * @param bool   $overwrite
      *
      * @return array<int, ProviderState>
@@ -33,7 +33,7 @@ public function setProviderState(string $name, array $params = [], bool $overwri
 
     /**
      * @param string $name
-     * @param array<string, string> $params
+     * @param array<string, mixed> $params
      * @param bool   $overwrite - if true reset the entire state
      *
      * @return $this
diff --git a/tests/PhpPact/Consumer/Model/InteractionTest.php b/tests/PhpPact/Consumer/Model/InteractionTest.php
index 1458a760..1c5c505a 100644
--- a/tests/PhpPact/Consumer/Model/InteractionTest.php
+++ b/tests/PhpPact/Consumer/Model/InteractionTest.php
@@ -124,4 +124,30 @@ public function testAddProviderState(bool $overwrite): void
             $this->assertSame(['key 2' => 'value 2'], $providerState->getParams());
         }
     }
+
+    public function testAddProviderStateWithParamMixedValue(): void
+    {
+        $this->interaction->addProviderState('provider state 1', ['string value' => 'test']);
+        $this->interaction->addProviderState('provider state 2', ['number value' => 123]);
+        $this->interaction->addProviderState('provider state 3', ['array value' => ['value 1', 'value 2', 'value 3']]);
+        $this->interaction->addProviderState('provider state 4', ['object value' => (object) ['key 1' => 'value 1', 'key 2' => 'value 2']]);
+        $providerStates = $this->interaction->getProviderStates();
+        $this->assertCount(4, $providerStates);
+        $providerState = reset($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 1', $providerState->getName());
+        $this->assertSame(['string value' => 'test'], $providerState->getParams());
+        $providerState = next($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 2', $providerState->getName());
+        $this->assertSame(['number value' => '123'], $providerState->getParams());
+        $providerState = next($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 3', $providerState->getName());
+        $this->assertSame(['array value' => '["value 1","value 2","value 3"]'], $providerState->getParams());
+        $providerState = next($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 4', $providerState->getName());
+        $this->assertSame(['object value' => '{"key 1":"value 1","key 2":"value 2"}'], $providerState->getParams());
+    }
 }
diff --git a/tests/PhpPact/Consumer/Model/MessageTest.php b/tests/PhpPact/Consumer/Model/MessageTest.php
index dc303362..fb268333 100644
--- a/tests/PhpPact/Consumer/Model/MessageTest.php
+++ b/tests/PhpPact/Consumer/Model/MessageTest.php
@@ -138,4 +138,30 @@ public function testMultipartContents(): void
         $multipart = new Multipart([], 'abc123');
         $this->message->setContents($multipart);
     }
+
+    public function testAddProviderStateWithParamMixedValue(): void
+    {
+        $this->message->addProviderState('provider state 1', ['string value' => 'test']);
+        $this->message->addProviderState('provider state 2', ['number value' => 123]);
+        $this->message->addProviderState('provider state 3', ['array value' => ['value 1', 'value 2', 'value 3']]);
+        $this->message->addProviderState('provider state 4', ['object value' => (object) ['key 1' => 'value 1', 'key 2' => 'value 2']]);
+        $providerStates = $this->message->getProviderStates();
+        $this->assertCount(4, $providerStates);
+        $providerState = reset($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 1', $providerState->getName());
+        $this->assertSame(['string value' => 'test'], $providerState->getParams());
+        $providerState = next($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 2', $providerState->getName());
+        $this->assertSame(['number value' => '123'], $providerState->getParams());
+        $providerState = next($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 3', $providerState->getName());
+        $this->assertSame(['array value' => '["value 1","value 2","value 3"]'], $providerState->getParams());
+        $providerState = next($providerStates);
+        $this->assertInstanceOf(ProviderState::class, $providerState);
+        $this->assertSame('provider state 4', $providerState->getName());
+        $this->assertSame(['object value' => '{"key 1":"value 1","key 2":"value 2"}'], $providerState->getParams());
+    }
 }