diff --git a/pkgs/letsencrypt-ca.nix b/pkgs/letsencrypt-ca.nix
index 0ad55b9..bc7f897 100644
--- a/pkgs/letsencrypt-ca.nix
+++ b/pkgs/letsencrypt-ca.nix
@@ -2,14 +2,14 @@
 
 let
   url = "https://letsencrypt.org/certs/letsencryptauthorityx3.pem.txt";
-  sha256 = "b6dd03f7fb8508e4f7ffe82ca8a3f98dde163e0bd44897e112a0850a5b606acf";
+  sha256 = "100lxxvqv4fj563bm03zzk5r36hq5jx9nnrajzs38g825c5k0cg2";
 
 in stdenv.mkDerivation {
 
   name = "letsencrypt-ca-pem";
 
   src = fetchurl {
-    name = "isrgrootx1.pem.txt";
+    name = "letsencryptauthorityx3.pem.txt";
     url = url;
     sha256 = sha256;
   };