diff --git a/libcurl_http_fetcher.cc b/libcurl_http_fetcher.cc
index ce3475d..4e33671 100644
--- a/libcurl_http_fetcher.cc
+++ b/libcurl_http_fetcher.cc
@@ -305,6 +305,7 @@
   LOG(INFO) << "Setting up curl options for HTTPS";
   CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_SSL_VERIFYPEER, 1), CURLE_OK);
   CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_SSL_VERIFYHOST, 2), CURLE_OK);
+  CHECK_EQ(curl_easy_setopt(curl_handle_, CURLOPT_CAINFO, nullptr), CURLE_OK);
   CHECK_EQ(curl_easy_setopt(
                curl_handle_, CURLOPT_CAPATH, constants::kCACertificatesPath),
            CURLE_OK);