diff --git a/src/client.c b/src/client.c
index cc5245e..ef0daa9 100644
--- a/src/client.c
+++ b/src/client.c
@@ -124,7 +124,10 @@ static void client_load_server_status(const char *address) {
 
   paired = pairedText != NULL && strcmp(pairedText, "1") == 0;
   currentGame = currentGameText == NULL ? 0 : atoi(currentGameText);
-  strstr(versionText, ".")[0] = 0;
+  char *versionSep = strstr(versionText, ".");
+  if (versionSep != NULL) {
+    *versionSep = 0;
+  }
   serverMajorVersion = atoi(versionText);
 
   free(pairedText);
@@ -306,7 +309,7 @@ void client_pair(const char *address) {
   sprintf(url, "https://%s:47984/pair?uniqueid=%s&devicename=roth&updateState=1&clientpairingsecret=%s", address, unique_id, client_pairing_secret_hex);
   http_request(url, data);
 
-  sprintf(url, "https://%s:47984/pair?uniqueid=%s&devicename=roth&updateState=1&phrase=pairchallenge", address, unique_id, challenge_response_hex);
+  sprintf(url, "https://%s:47984/pair?uniqueid=%s&devicename=roth&updateState=1&phrase=pairchallenge", address, unique_id);
   http_request(url, data);
   http_free_data(data);
 
diff --git a/src/xml.c b/src/xml.c
index 1cb960a..4dc1fb9 100644
--- a/src/xml.c
+++ b/src/xml.c
@@ -92,7 +92,7 @@ int xml_search(char* data, size_t len, char* node, char** result) {
   struct xml_query search;
   search.data = node;
   search.start = 0;
-  search.memory = malloc(1);
+  search.memory = calloc(1, 1);
   search.size = 0;
   XML_Parser parser = XML_ParserCreate("UTF-8");
   XML_SetUserData(parser, &search);
@@ -110,7 +110,7 @@ int xml_search(char* data, size_t len, char* node, char** result) {
 
 struct app_list* xml_applist(char* data, size_t len) {
   struct xml_query query;
-  query.memory = malloc(1);
+  query.memory = calloc(1, 1);
   query.size = 0;
   query.start = 0;
   query.data = NULL;