diff --git a/Pod/Classes/Categories/NSString+SnapchatKit.h b/Pod/Classes/Categories/NSString+SnapchatKit.h
index 3c6f45b..c67da4a 100755
--- a/Pod/Classes/Categories/NSString+SnapchatKit.h
+++ b/Pod/Classes/Categories/NSString+SnapchatKit.h
@@ -32,6 +32,8 @@
 + (NSString *)timestamp;
 + (NSString *)timestampFrom:(NSDate *)date;
 + (NSString *)queryStringWithParams:(NSDictionary *)params;
++ (NSString *)queryStringWithParams:(NSDictionary *)params URLEscapeValues:(BOOL)escapeValues;
+
 @end
 
 
diff --git a/Pod/Classes/Categories/NSString+SnapchatKit.m b/Pod/Classes/Categories/NSString+SnapchatKit.m
index 394eab2..d82d4d5 100755
--- a/Pod/Classes/Categories/NSString+SnapchatKit.m
+++ b/Pod/Classes/Categories/NSString+SnapchatKit.m
@@ -109,12 +109,21 @@ + (NSString *)timestampFrom:(NSDate *)date {
 }
 
 + (NSString *)queryStringWithParams:(NSDictionary *)params {
+    return [NSString queryStringWithParams:params URLEscapeValues:NO];
+}
+
++ (NSString *)queryStringWithParams:(NSDictionary *)params URLEscapeValues:(BOOL)escapeValues {
     if (params.allKeys.count == 0) return @"";
     
     NSMutableString *q = [NSMutableString string];
     [params enumerateKeysAndObjectsUsingBlock:^(NSString *key, id value, BOOL *stop) {
-        if ([value isKindOfClass:[NSString class]])
-            value = [(NSString *)value stringByReplacingOccurrencesOfString:@" " withString:@"+"];
+        if ([value isKindOfClass:[NSString class]]) {
+            if (escapeValues) {
+                value = [(NSString *)value urlencode];
+            } else {
+                value = [(NSString *)value stringByReplacingOccurrencesOfString:@" " withString:@"+"];
+            }
+        }
         [q appendFormat:@"%@=%@&", key, value];
     }];
     
@@ -123,6 +132,26 @@ + (NSString *)queryStringWithParams:(NSDictionary *)params {
     return q;
 }
 
+- (NSString *)urlencode {
+    NSMutableString *output = [NSMutableString string];
+    const unsigned char *source = (const unsigned char *)[self UTF8String];
+    int sourceLen = (int)strlen((const char *)source);
+    for (int i = 0; i < sourceLen; ++i) {
+        const unsigned char thisChar = source[i];
+        if (thisChar == ' '){
+            [output appendString:@"+"];
+        } else if (thisChar == '.' || thisChar == '-' || thisChar == '_' || thisChar == '~' ||
+                   (thisChar >= 'a' && thisChar <= 'z') ||
+                   (thisChar >= 'A' && thisChar <= 'Z') ||
+                   (thisChar >= '0' && thisChar <= '9')) {
+            [output appendFormat:@"%c", thisChar];
+        } else {
+            [output appendFormat:@"%%%02X", thisChar];
+        }
+    }
+    return output;
+}
+
 @end
 
 
diff --git a/Pod/Classes/Networking/SKClient.m b/Pod/Classes/Networking/SKClient.m
index 25fac8c..b51bd24 100755
--- a/Pod/Classes/Networking/SKClient.m
+++ b/Pod/Classes/Networking/SKClient.m
@@ -339,11 +339,11 @@ - (void)getAttestation:(NSString *)username password:(NSString *)password ts:(NS
                                         @"apk_digest": SKAttestation.digest9_14_2};
                 
                 request.URL = [NSURL URLWithString:SKAttestation.protobufPOSTURL];
-                request.HTTPBody = [[NSString queryStringWithParams:query] dataUsingEncoding:NSUTF8StringEncoding];
+                request.HTTPBody = [[NSString queryStringWithParamsForAttestion:query] dataUsingEncoding:NSUTF8StringEncoding];
+                [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
+                
                 [[session dataTaskWithRequest:request completionHandler:^(NSData *data2, NSURLResponse *response2, NSError *error2) {
-                    /////////////////////////////////
-                    // This is where I get the 400 //
-                    /////////////////////////////////
+                    
                     if (!error2 && [(NSHTTPURLResponse *)response2 statusCode] == 200) {
                         jsonError = nil;
                         json = [NSJSONSerialization JSONObjectWithData:data2 options:0 error:&jsonError];
@@ -355,6 +355,8 @@ - (void)getAttestation:(NSString *)username password:(NSString *)password ts:(NS
                             request.URL = [NSURL URLWithString:SKAttestation.attestationURL];
                             request.HTTPBody = [json[@"binary"] base64DecodedData];
                             [request setValue:SKAttestation.userAgent forHTTPHeaderField:SKHeaders.userAgent];
+                            [request setValue:SKHeaders.values.protobuf forHTTPHeaderField:SKHeaders.contentType];
+                            
                             [[session dataTaskWithRequest:request completionHandler:^(NSData *data3, NSURLResponse *response3, NSError *error3) {
                                 if (!error3 && [(NSHTTPURLResponse *)response3 statusCode] == 200) {
                                     jsonError = nil;