diff --git a/.gitignore b/.gitignore
index 5a3a6ae..7996cb4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 # Release tarballs.
 byacc-20*.t*gz
+# Signatures.
+byacc-20*.t*gz.asc
 # Generated (source) RPMs.
 *.rpm
 # Expanded source trees.
diff --git a/byacc.spec b/byacc.spec
index 845b4b2..816bb36 100644
--- a/byacc.spec
+++ b/byacc.spec
@@ -1,9 +1,9 @@
-%define byaccdate 20200330
+%define byaccdate 20200910
 
 Summary: Berkeley Yacc, a parser generator
 Name: byacc
-Version: 1.9.%{byaccdate}
-Release: 3%{?dist}
+Version: 2.0.%{byaccdate}
+Release: 1%{?dist}
 License: Public Domain
 URL: http://invisible-island.net/byacc/byacc.html
 Source: ftp://invisible-island.net/byacc/byacc-%{byaccdate}.tgz
@@ -50,6 +50,9 @@ echo ====================TESTING END=====================
 %{_mandir}/man1/byacc.1*
 
 %changelog
+* Tue Nov 10 2020 Arjun Shankar <arjun@redhat.com> - 2.0-20200910-1
+- Rebase to byacc-2.0-20200910 (#1877980)
+
 * Sat Aug 01 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.20200330-3
 - Second attempt - Rebuilt for
   https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
diff --git a/sources b/sources
index a4f327e..f8fc458 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (byacc-20200330.tgz) = df8cc1aa550d633ab547a13a4f091d8c940a9a67b52dc5ecacad5b005fd54c3ceb1269593068c1a7949049e85b6e6eea20cffbbf4b408e049fde75c0ffe51f07
+SHA512 (byacc-20200910.tgz) = 491bbde2d5b0fdf2ad57bec5080112ad7c12ce3830b5e14f2289092aad1addae6edd4698368a9c8d69219a95ae5fa47eb32a95a2625841915297972591bebea3