diff --git a/pkgs/applications/science/logic/abc/default.nix b/pkgs/applications/science/logic/abc/default.nix
index bea9381132fd..1062582d82c4 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 = "unstable-2023-02-23";
+  version = "unstable-2023-06-28";
 
   src = fetchFromGitHub {
     owner = "yosyshq";
     repo  = "abc";
-    rev   = "2c1c83f75b8078ced51f92c697da3e712feb3ac3";
-    hash  = "sha256-THcyEifIp9v1bOofFVm9NFPqgI6NfKKys+Ea2KyNpv8=";
+    rev   = "bb64142b07794ee685494564471e67365a093710";
+    hash  = "sha256-Qkk61Lh84ervtehWskSB9GKh+JPB7mI1IuG32OSZMdg=";
   };
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/compilers/yosys/default.nix b/pkgs/development/compilers/yosys/default.nix
index 213a47626201..a25142fa9fd5 100644
--- a/pkgs/development/compilers/yosys/default.nix
+++ b/pkgs/development/compilers/yosys/default.nix
@@ -71,13 +71,13 @@ let
 
 in stdenv.mkDerivation rec {
   pname   = "yosys";
-  version = "0.30";
+  version = "0.31";
 
   src = fetchFromGitHub {
     owner = "YosysHQ";
     repo  = "yosys";
     rev   = "${pname}-${version}";
-    hash  = "sha256-qhMcXJFEuBPl7vh+gYTu7PnSWi+L3YMLrBMQyYqfc0w=";
+    hash  = "sha256-BGeqI0U2AdKgsQQw3f/C0l1ENPTlQ3Eoa8TaLRE+aWI=";
   };
 
   enableParallelBuilding = true;