diff --git a/appveyor.yml b/appveyor.yml
index d4b0560..8bed1b3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,7 @@ shallow_clone: true
 
 environment:
   LR_EXTERNAL: c:\external
-  CURL_VER: 7.53.1
+  CURL_VER: 7.54.0
 
   matrix:
   - LUA: "lua 5.1"
diff --git a/src/lcopteasy.h b/src/lcopteasy.h
index c837e4f..035d819 100644
--- a/src/lcopteasy.h
+++ b/src/lcopteasy.h
@@ -267,6 +267,18 @@ FLG_ENTRY( SSLVERSION_TLSv1_0 )
 FLG_ENTRY( SSLVERSION_TLSv1_1 )
 FLG_ENTRY( SSLVERSION_TLSv1_2 )
 #endif
+#if LCURL_CURL_VER_GE(7,52,0)
+FLG_ENTRY( SSLVERSION_TLSv1_3 )
+#endif
+
+#if LCURL_CURL_VER_GE(7,54,0)
+FLG_ENTRY( SSLVERSION_MAX_NONE    )
+FLG_ENTRY( SSLVERSION_MAX_DEFAULT )
+FLG_ENTRY( SSLVERSION_MAX_TLSv1_0 )
+FLG_ENTRY( SSLVERSION_MAX_TLSv1_1 )
+FLG_ENTRY( SSLVERSION_MAX_TLSv1_2 )
+FLG_ENTRY( SSLVERSION_MAX_TLSv1_3 )
+#endif
 
 #if LCURL_CURL_VER_GE(7,21,4)
 FLG_ENTRY( TLSAUTH_SRP )
@@ -380,6 +392,10 @@ OPT_ENTRY( proxy_pinnedpublickey,  PROXY_PINNEDPUBLICKEY,  STR, 0, LCURL_DEFAULT
 OPT_ENTRY( abstract_unix_socket,   ABSTRACT_UNIX_SOCKET,  STR, 0, LCURL_DEFAULT_VALUE)
 #endif
 
+#if LCURL_CURL_VER_GE(7,54,0)
+OPT_ENTRY( suppress_connect_headers, SUPPRESS_CONNECT_HEADERS, LNG, 0, LCURL_DEFAULT_VALUE)
+#endif
+
 #ifdef LCURL__TCP_FASTOPEN
 #  define TCP_FASTOPEN LCURL__TCP_FASTOPEN
 #  undef LCURL__TCP_FASTOPEN