diff --git a/appveyor.yml b/appveyor.yml
index 48c7332a9e9ef3d8043a6042652d3a074c01703e..2ece57c0b6660d2bbd7c4d5023be457d508c80af 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 environment:
-  CURL_VERSION: 7.39.0
+  CURL_VERSION: 7.56.1
 
 install:
   - git submodule update --init --recursive