diff --git a/appveyor.yml b/appveyor.yml
index e25eb640..f00611ae 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,18 +6,19 @@ environment:
   matrix:
       - TARGET: x86_64-pc-windows-msvc
         BITS: 64
-        OPENSSL_VERSION: 1_1_0b
+        OPENSSL_VERSION: 1_1_0e
         MSYS2: 1
       # - TARGET: i686-pc-windows-msvc
       #   BITS: 32
       #   OPENSSL_VERSION: 1_1_0b
       - TARGET: i686-pc-windows-gnu
         BITS: 32
-        OPENSSL_VERSION: 1_1_0b
+        OPENSSL_VERSION: 1_1_0e
         MSYS2: 1
 install:
   - ps: Start-FileDownload "http://slproweb.com/download/Win${env:BITS}OpenSSL-${env:OPENSSL_VERSION}.exe"
   - Win%BITS%OpenSSL-%OPENSSL_VERSION%.exe /SILENT /VERYSILENT /SP- /DIR="C:\OpenSSL"
+  - ps: Start-FileDownload "https://curl.haxx.se/ca/cacert.pem" -FileName "C:\OpenSSL\cacert.pem"
 
   # Install Rust
   - curl -sSf -o rustup-init.exe https://win.rustup.rs/