diff --git a/extend/lcodec/src/websocket.h b/extend/lcodec/src/websocket.h
index cc4861f7..ebfb7c52 100644
--- a/extend/lcodec/src/websocket.h
+++ b/extend/lcodec/src/websocket.h
@@ -105,7 +105,7 @@ namespace lcodec {
 
     protected:
         char* xor_byte(char* buffer, char* mask, size_t blen, size_t mlen) {
-            for (int i = 0; i < blen; i++) {
+            for (size_t i = 0; i < blen; i++) {
                 buffer[i] = buffer[i] ^ mask[i % mlen];
             }
             return buffer;
diff --git a/extend/lssl/src/ssl/lssl.cpp b/extend/lssl/src/ssl/lssl.cpp
index f1d8f934..3ea18b0a 100644
--- a/extend/lssl/src/ssl/lssl.cpp
+++ b/extend/lssl/src/ssl/lssl.cpp
@@ -77,17 +77,17 @@ namespace lssl {
     }
 
     static int lfromhex(lua_State* L) {
-        int sz = 0;
+        size_t sz = 0;
         const unsigned char* text = (const unsigned char*)luaL_checklstring(L, 1, &sz);
         if (sz & 2) {
-            return luaL_error(L, "Invalid hex text size %d", (int)sz);
+            return luaL_error(L, "Invalid hex text size %lu", (int)sz);
         }
         char tmp[UCHAR_MAX];
         char* buffer = tmp;
         if (sz > UCHAR_MAX * 2) {
             buffer = (char*)lua_newuserdata(L, sz / 2);
         }
-        int i;
+        size_t i;
         for (i = 0; i < sz; i += 2) {
             char hi, low;
             HEX(hi, text[i]);
@@ -281,7 +281,7 @@ namespace lssl {
     }
 
     static int lxor_byte(lua_State* L) {
-        int len1, len2;
+        size_t len1, len2;
         const char* s1 = luaL_checklstring(L, 1, &len1);
         const char* s2 = luaL_checklstring(L, 2, &len2);
         if (len2 == 0) {
@@ -289,7 +289,7 @@ namespace lssl {
         }
         luaL_Buffer b;
         char* buffer = luaL_buffinitsize(L, &b, len1);
-        int i;
+        size_t i;
         for (i = 0; i < len1; i++) {
             buffer[i] = s1[i] ^ s2[i % len2];
         }