diff --git a/collectors/APICallCollector.js b/collectors/APICallCollector.js
index e7599439..be9fc36e 100644
--- a/collectors/APICallCollector.js
+++ b/collectors/APICallCollector.js
@@ -87,7 +87,13 @@ class APICallCollector extends BaseCollector {
                 this._calls.push({
                     source: breakpoint.source,
                     description: breakpoint.description,
-                    arguments: breakpoint.arguments
+                    arguments: breakpoint.arguments.map(arg => {
+                        try {
+                            return JSON.parse(arg);
+                        } catch (e) {
+                            return arg;
+                        }
+                    })
                 });
             }
         }
diff --git a/collectors/APICalls/TrackerTracker.js b/collectors/APICalls/TrackerTracker.js
index 2535e3e1..1d758a4a 100644
--- a/collectors/APICalls/TrackerTracker.js
+++ b/collectors/APICalls/TrackerTracker.js
@@ -84,7 +84,13 @@ class TrackerTracker {
             // only save arguments if requested for given breakpoint
             if (saveArguments) {
                 conditionScript += `
-                    data.args = Array.from(arguments).map(a => a.toString());
+                    data.args = Array.from(arguments).map(a => {
+                        try {
+                            return JSON.stringify(a);
+                        } catch (e) {
+                            return a.toString();
+                        }
+                    });
                 `;
             }
 
diff --git a/tests/collectors/APICallCollector.test.js b/tests/collectors/APICallCollector.test.js
index f7a70153..149b8ccf 100644
--- a/tests/collectors/APICallCollector.test.js
+++ b/tests/collectors/APICallCollector.test.js
@@ -97,7 +97,10 @@ async function main() {
         payload: JSON.stringify({
             description: 'Document.cookie setter',
             stack: '(https://example.com/different.js:1:23)\n(https://example.com/different.js:2:23)',
-            args: ['uuid=123']
+            args: [
+                "\"uuid=123\"",
+                "{\"key\":\"key\",\"value\":\"value\"}"
+            ]
         })
     });
 
@@ -113,7 +116,11 @@ async function main() {
                 source: 'https://example.com/different.js',
                 description: 'Document.cookie setter',
                 arguments: [
-                    'uuid=123'
+                    "uuid=123",
+                    {
+                        key: "key",
+                        value: "value"
+                    }
                 ]
             }
         ]