diff --git a/pkgs/applications/science/logic/abc/default.nix b/pkgs/applications/science/logic/abc/default.nix
index 11121d1f5584..4f37651a171c 100644
--- a/pkgs/applications/science/logic/abc/default.nix
+++ b/pkgs/applications/science/logic/abc/default.nix
@@ -4,13 +4,13 @@
 
 stdenv.mkDerivation rec {
   pname   = "abc-verifier";
-  version = "2022.05.06";
+  version = "2022.07.27";
 
   src = fetchFromGitHub {
     owner = "yosyshq";
     repo  = "abc";
-    rev   = "09a7e6dac739133a927ae7064d319068ab927f90";
-    hash  = "sha256-+1UcYjK2mvhlTHl6lVCcj5q+1D8RUTquHaajSl5NuJg=";
+    rev   = "7cc11f7f0c49d4ce7e0ed88950d1c4c8abb1cba4";
+    hash  = "sha256-6m8XpSYWT0uMpYHXm3ExnH7RMg923YqZAJPTBeFXMzg=";
   };
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/compilers/yosys/default.nix b/pkgs/development/compilers/yosys/default.nix
index 564ada5d6c07..984678f689c5 100644
--- a/pkgs/development/compilers/yosys/default.nix
+++ b/pkgs/development/compilers/yosys/default.nix
@@ -72,13 +72,13 @@ let
 
 in stdenv.mkDerivation rec {
   pname   = "yosys";
-  version = "0.18";
+  version = "0.20";
 
   src = fetchFromGitHub {
     owner = "YosysHQ";
     repo  = "yosys";
     rev   = "${pname}-${version}";
-    hash  = "sha256-uvJYL7cUhf6gTvfeIVKWMB2DH5qcYzhB2WPeJf1rCTI=";
+    hash  = "sha256-0oDF6wLcWlDG2hWFjIL+oQmICQl/H6YAwDzgTiuF298=";
   };
 
   enableParallelBuilding = true;