diff --git a/pkgs/development/libraries/grpc/default.nix b/pkgs/development/libraries/grpc/default.nix
index 2110755a1719..831fbe6884ad 100644
--- a/pkgs/development/libraries/grpc/default.nix
+++ b/pkgs/development/libraries/grpc/default.nix
@@ -21,7 +21,7 @@
 
 stdenv.mkDerivation rec {
   pname = "grpc";
-  version = "1.62.1"; # N.B: if you change this, please update:
+  version = "1.66.1"; # N.B: if you change this, please update:
     # pythonPackages.grpcio-tools
     # pythonPackages.grpcio-status
 
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     owner = "grpc";
     repo = "grpc";
     rev = "v${version}";
-    hash = "sha256-L0bn6Bg36UKIRxznH9o4T7WXUqMwFjr8ybeQfbUi8xM=";
+    hash = "sha256-CmQUUbIYPWRS7q7OX+TmkTvoqtJAUEwhL/lev8JdB8U=";
     fetchSubmodules = true;
   };
 
@@ -40,7 +40,8 @@ stdenv.mkDerivation rec {
       url = "https://github.com/lopsided98/grpc/commit/a9b917666234f5665c347123d699055d8c2537b2.patch";
       hash = "sha256-Lm0GQsz/UjBbXXEE14lT0dcRzVmCKycrlrdBJj+KLu8=";
     })
-  ];
+    # fix build of 1.63.0 and newer on darwin: https://github.com/grpc/grpc/issues/36654
+  ] ++ (lib.optional stdenv.hostPlatform.isDarwin ./dynamic-lookup-darwin.patch);
 
   nativeBuildInputs = [ cmake pkg-config ]
     ++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) grpc;
diff --git a/pkgs/development/libraries/grpc/dynamic-lookup-darwin.patch b/pkgs/development/libraries/grpc/dynamic-lookup-darwin.patch
new file mode 100644
index 000000000000..d72ffcc72190
--- /dev/null
+++ b/pkgs/development/libraries/grpc/dynamic-lookup-darwin.patch
@@ -0,0 +1,11 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 053b9e3784..0979b504da 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -38083,3 +38083,6 @@ generate_pkgconfig(
+   "-lgrpcpp_otel_plugin"
+   "-laddress_sorting -lupb_textformat_lib -lupb_json_lib -lupb_wire_lib -lupb_message_lib -lutf8_range_lib -lupb_mini_descriptor_lib -lupb_mem_lib -lupb_base_lib"
+   "grpcpp_otel_plugin.pc")
++
++target_link_options(upb_textformat_lib PRIVATE -Wl,-undefined,dynamic_lookup)
++target_link_options(upb_json_lib PRIVATE -Wl,-undefined,dynamic_lookup)