diff --git a/src/test-data/capture-har_redirect-loop.har b/src/test-data/capture-har_redirect-loop.har
new file mode 100644
index 00000000..9558f75e
--- /dev/null
+++ b/src/test-data/capture-har_redirect-loop.har
@@ -0,0 +1,983 @@
+{
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+          },
+          "redirectURL": "https://www.httpbin.org/relative-redirect/15",
+          "headersSize": -1,
+          "bodySize": -1
+        },
+        "cache": {},
+        "timings": {
+          "send": 0,
+          "receive": 0,
+          "wait": 6.999412
+        }
+      },
+      {
+        "startedDateTime": "2017-03-08T16:14:18.823Z",
+        "time": 7.506675,
+        "request": {
+          "method": "GET",
+          "url": "https://www.httpbin.org/relative-redirect/15",
+          "httpVersion": "HTTP/1.1",
+          "cookies": [],
+          "headers": [
+            {
+              "name": "host",
+              "value": "www.httpbin.org"
+            },
+            {
+              "name": "user-agent",
+              "value": "woobot/2.0"
+            },
+            {
+              "name": "connection",
+              "value": "close"
+            },
+            {
+              "name": "accept",
+              "value": "*/*"
+            },
+            {
+              "name": "accept-encoding",
+              "value": "gzip, deflate"
+            }
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1
+        },
+        "response": {
+          "status": 302,
+          "statusText": "FOUND",
+          "httpVersion": "HTTP/1.1",
+          "cookies": [],
+          "headers": [
+            {
+              "name": "server",
+              "value": "nginx"
+            },
+            {
+              "name": "date",
+              "value": "Wed, 08 Mar 2017 16:14:18 GMT"
+            },
+            {
+              "name": "content-type",
+              "value": "text/html; charset=utf-8"
+            },
+            {
+              "name": "content-length",
+              "value": "0"
+            },
+            {
+              "name": "connection",
+              "value": "close"
+            },
+            {
+              "name": "location",
+              "value": "/relative-redirect/14"
+            },
+            {
+              "name": "access-control-allow-origin",
+              "value": "*"
+            },
+            {
+              "name": "access-control-allow-credentials",
+              "value": "true"
+            }
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "text/html"
+          },
+          "redirectURL": "https://www.httpbin.org/relative-redirect/14",
+          "headersSize": -1,
+          "bodySize": -1,
+          "_error": {
+            "message": "Max redirects exceeded",
+            "code": "MAXREDIRECTS"
+          }
+        },
+        "cache": {},
+        "timings": {
+          "send": 0,
+          "receive": 0,
+          "wait": 7.506675
+        }
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/src/ts/transformers/har-heuristics.ts b/src/ts/transformers/har-heuristics.ts
index e4457e7f..207b9018 100644
--- a/src/ts/transformers/har-heuristics.ts
+++ b/src/ts/transformers/har-heuristics.ts
@@ -79,6 +79,10 @@ function isPush(entry: Entry): boolean {
  */
 export function documentIsSecure(data: Entry[]) {
   const rootDocument = data.filter((e) => !e.response.redirectURL)[0];
+  // check if request is a redirect chain
+  if (rootDocument === undefined) {
+    return (data.length > 0) ? isSecure(data[0]) : false;
+  }
   return isSecure(rootDocument);
 }