diff --git a/pkgs/development/libraries/libdap/default.nix b/pkgs/development/libraries/libdap/default.nix
index 5a0006ad6c6..d399998455e 100644
--- a/pkgs/development/libraries/libdap/default.nix
+++ b/pkgs/development/libraries/libdap/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, bison, libuuid, curl, libxml2, flex }:
 
 stdenv.mkDerivation rec {
-  version = "3.19.1";
+  version = "3.20.0";
   name = "libdap-${version}";
 
   nativeBuildInputs = [ bison flex ];
@@ -9,12 +9,12 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://www.opendap.org/pub/source/${name}.tar.gz";
-    sha256 = "0gnki93z3kkzp65x7n1kancy7bd503j4qja5fhzvm1gkmi5l65aj";
+    sha256 = "0cr3d7dlzq583dqqrkbs1bkcrwag4hp7hwrx5c0mjk7q4vrslh92";
   };
 
   meta = with stdenv.lib; {
     description = "A C++ SDK which contains an implementation of DAP";
-    homepage = https://www.opendap.org/download/libdap;
+    homepage = https://www.opendap.org/software/libdap;
     license = licenses.lgpl2;
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.linux;