diff --git a/.gitignore b/.gitignore
index db66ab2..373df20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /shaderc-7c2aa93.tar.gz
 /shaderc-4162bb1.tar.gz
 /shaderc-1fce597.tar.gz
+/shaderc-0dbd899.tar.gz
diff --git a/0001-Drop-third-party-code-in-CMakeLists.txt.patch b/0001-Drop-third-party-code-in-CMakeLists.txt.patch
index 541bcc0..52697f5 100644
--- a/0001-Drop-third-party-code-in-CMakeLists.txt.patch
+++ b/0001-Drop-third-party-code-in-CMakeLists.txt.patch
@@ -1,15 +1,12 @@
 diff -up shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt.orig shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt
 --- shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt.orig        2020-01-22 21:15:53.000000000 +0100
 +++ shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt     2020-02-02 21:06:15.193583552 +0100
-@@ -98,7 +98,6 @@ endif(MSVC)
- 
+@@ -102,18 +102,10 @@ endif(MSVC)
+
  # Configure subdirectories.
  # We depend on these for later projects, so they should come first.
 -add_subdirectory(third_party)
- 
- if(SHADERC_ENABLE_SPVC)
- add_subdirectory(libshaderc_spvc)
-@@ -107,13 +106,6 @@ endif()
+
  add_subdirectory(libshaderc_util)
  add_subdirectory(libshaderc)
  add_subdirectory(glslc)
@@ -20,6 +17,6 @@ diff -up shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt.orig sh
 -  ${CMAKE_CURRENT_SOURCE_DIR}/utils/update_build_version.py
 -  ${shaderc_SOURCE_DIR} ${spirv-tools_SOURCE_DIR} ${glslang_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}/build-version.inc
 -  COMMENT "Update build-version.inc in the Shaderc build directory (if necessary).")
- 
+
  function(define_pkg_config_file NAME LIBS)
    add_custom_target(${NAME}-pkg-config ALL
diff --git a/shaderc.spec b/shaderc.spec
index 889b0c6..e518fb2 100644
--- a/shaderc.spec
+++ b/shaderc.spec
@@ -1,16 +1,16 @@
 # Force out of source build
 %undefine __cmake_in_source_build
 
-# Release 2020.3
-%global commit          1fce59794079f90ceb091190adbbb5499acd4e95
+# Release 2020.4
+%global commit          0dbd899941a43ffd55df527d65128b3b66e75c9c
 %global shortcommit     %(c=%{commit}; echo ${c:0:7})
-%global snapshotdate    20200902
+%global snapshotdate    20201226
 
 # Glslang revision from packaged version
 %global glslang_version d550bebee919179c9e332a0ab28a67f8fe3ca239
 
 Name:           shaderc
-Version:        2020.3
+Version:        2020.4
 Release:        1%{?dist}
 Summary:        A collection of tools, libraries, and tests for Vulkan shader compilation
 
@@ -126,6 +126,10 @@ sed -i 's|SPIRV/GlslangToSpv.h|glslang/SPIRV/GlslangToSpv.h|' libshaderc_util/sr
 %{_libdir}/pkgconfig/shaderc_combined.pc
 
 %changelog
+* Sat Dec 26 15:21:39 CET 2020 Robert-André Mauchin <zebob.m@gmail.com> - 2020.4-1
+- Update to 2020.4
+- Close: rhbz#1906260
+
 * Sat Dec 05 2020 Robert-André Mauchin <zebob.m@gmail.com> - 2020.3-1
 - Update to 2020.3
 - Close: rhbz#1875183
diff --git a/sources b/sources
index 504597e..12bde10 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (shaderc-1fce597.tar.gz) = 7622bedab115645da353f63443e1ab3d3e30d4a80ac5bc0dad82019b35d41c64ec20ff8846f8611d9f6598103cb902289f25597cf54887af2c838aaa6d18726d
+SHA512 (shaderc-0dbd899.tar.gz) = fe85aa633abaff22ae2a52af474cc45d068d018aa2821efd1e7c1016be598eb29085be1822400865826aa4d481ae0286a93c5925cc83f364070815fc1172d027