diff --git a/pkgs/applications/science/logic/abc/default.nix b/pkgs/applications/science/logic/abc/default.nix
index 0bad0046e939..29d727d988e7 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 = "2020.04.30";
+  version = "2020.06.22";
 
   src = fetchFromGitHub {
     owner  = "berkeley-abc";
     repo   = "abc";
-    rev    = "fd2c9b1c19216f6b756f88b18f5ca67b759ca128";
-    sha256 = "1d18pkpsx0nlzl3a6lyfdnpk4kixjmgswy6cp5fbrkpp4rf1gahi";
+    rev    = "341db25668f3054c87aa3372c794e180f629af5d";
+    sha256 = "14cgv34vz5ljkcms6nrv19vqws2hs8bgjgffk5q03cbxnm2jxv5s";
   };
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/compilers/yosys/default.nix b/pkgs/development/compilers/yosys/default.nix
index 1ac34c243156..7d645da8b4b1 100644
--- a/pkgs/development/compilers/yosys/default.nix
+++ b/pkgs/development/compilers/yosys/default.nix
@@ -16,13 +16,13 @@
 
 stdenv.mkDerivation rec {
   pname   = "yosys";
-  version = "2020.06.19";
+  version = "2020.07.07";
 
   src = fetchFromGitHub {
     owner  = "YosysHQ";
     repo   = "yosys";
-    rev    = "338ecbe02f8bb3cc4d69de1445c7f398a814b4e4";
-    sha256 = "0j5jwyxrq8rmwpyyidid6yp6g5bq7jwnhmn2ycj82kdj787p9vvs";
+    rev    = "000fd08198487cd1d36e65e4470f4b0269c23a2b";
+    sha256 = "01s252vwh4g1f4y99nfrkpf6hgvh9k63nz8hvpmjza5z8x6zf4i1";
   };
 
   enableParallelBuilding = true;