diff --git a/SignalServiceKit/src/Network/API/Requests/OWSRequestFactory.m b/SignalServiceKit/src/Network/API/Requests/OWSRequestFactory.m
index 3f6ebdbfe..1358cbaf8 100644
--- a/SignalServiceKit/src/Network/API/Requests/OWSRequestFactory.m
+++ b/SignalServiceKit/src/Network/API/Requests/OWSRequestFactory.m
@@ -292,6 +292,10 @@ NS_ASSUME_NONNULL_BEGIN
     request.authUsername = authUsername;
     request.authPassword = authPassword;
 
+    // Don't bother with the default cookie store;
+    // these cookies are ephemeral.
+    [request setHTTPShouldHandleCookies:NO];
+
     return request;
 }
 
@@ -320,11 +324,11 @@ NS_ASSUME_NONNULL_BEGIN
     request.authUsername = authUsername;
     request.authPassword = authPassword;
 
-    NSDictionary<NSString *, NSString *> *cookieHeaders = [NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
-    for (NSString *cookieHeader in cookieHeaders) {
-        NSString *cookieValue = cookieHeaders[cookieHeader];
-        [request setValue:cookieValue forHTTPHeaderField:cookieHeader];
-    }
+    // Don't bother with the default cookie store;
+    // these cookies are ephemeral.
+    [request setHTTPShouldHandleCookies:NO];
+    // Set the cookie header.
+    [request setAllHTTPHeaderFields:[NSHTTPCookie requestHeaderFieldsWithCookies:cookies]];
 
     return request;
 }
diff --git a/SignalServiceKit/src/Network/API/TSNetworkManager.m b/SignalServiceKit/src/Network/API/TSNetworkManager.m
index 71d38ddb8..2c57838fd 100644
--- a/SignalServiceKit/src/Network/API/TSNetworkManager.m
+++ b/SignalServiceKit/src/Network/API/TSNetworkManager.m
@@ -117,6 +117,17 @@ typedef void (^failureBlock)(NSURLSessionDataTask *task, NSError *error);
                                                                              password:request.authPassword];
         }
 
+        // Honor the request's preferences about default cookie handling.
+        //
+        // Default is YES.
+        sessionManager.requestSerializer.HTTPShouldHandleCookies = request.HTTPShouldHandleCookies;
+
+        // Honor the request's headers.
+        for (NSString *headerField in request.allHTTPHeaderFields) {
+            NSString *headerValue = request.allHTTPHeaderFields[headerField];
+            [sessionManager.requestSerializer setValue:headerValue forHTTPHeaderField:headerField];
+        }
+
         if ([request.HTTPMethod isEqualToString:@"GET"]) {
             [sessionManager GET:request.URL.absoluteString
                      parameters:request.parameters
@@ -223,7 +234,6 @@ typedef void (^failureBlock)(NSURLSessionDataTask *task, NSError *error);
               OWSLogError(
                   @"The request contains an invalid parameter : %@, %@", networkError.debugDescription, request);
 
-
               error.isRetryable = NO;
 
               failureBlock(task, error);