diff --git a/BUILD.gn b/BUILD.gn
index 7b40d1d..9fb5fb7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -28,7 +28,7 @@
     "libshaderc_util/include/libshaderc_util/exceptions.h",
     "libshaderc_util/include/libshaderc_util/file_finder.h",
     "libshaderc_util/include/libshaderc_util/format.h",
-    "libshaderc_util/include/libshaderc_util/io.h",
+    "libshaderc_util/include/libshaderc_util/io_shaderc.h",
     "libshaderc_util/include/libshaderc_util/message.h",
     "libshaderc_util/include/libshaderc_util/mutex.h",
     "libshaderc_util/include/libshaderc_util/resources.h",
@@ -38,7 +38,7 @@
     "libshaderc_util/include/libshaderc_util/version_profile.h",
     "libshaderc_util/src/compiler.cc",
     "libshaderc_util/src/file_finder.cc",
-    "libshaderc_util/src/io.cc",
+    "libshaderc_util/src/io_shaderc.cc",
     "libshaderc_util/src/message.cc",
     "libshaderc_util/src/resources.cc",
     "libshaderc_util/src/shader_stage.cc",
diff --git a/CHANGES b/CHANGES
index 83e8382..af95a60 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,13 @@
 Revision history for Shaderc
 
+v2021.0 2021-04-21
+ - Refresh dependencies (in DEPS):
+   - SPIRV-Tools v2021.1
+   - SPIRV-Headers snapshot 2021-04-21
+   - Glslang 11.2.0, snapshot 2021-04-21
+ - Fixes:
+   #1174: Windows Bazel support: rename internal headers io.* to io_shaderc.*
+
 v2020.5 2021-02-19
  - Refresh dependencies (in DEPS):
    - SPIRV-Tools v2020.7 + 1 patch
diff --git a/DEPS b/DEPS
index 46f4e6e..c177661 100644
--- a/DEPS
+++ b/DEPS
@@ -5,11 +5,11 @@
   'khronos_git': 'https://github.com/KhronosGroup',
 
   'effcee_revision' : '2ec8f8738118cc483b67c04a759fee53496c5659',
-  'glslang_revision': 'e56beaee736863ce48455955158f1839e6e4c1a1',
+  'glslang_revision': '60ce877de03ff03bb87fb9ef6b744ee33d076034',
   'googletest_revision': '389cb68b87193358358ae87cc56d257fd0d80189',
   're2_revision': '7107ebc4fbf7205151d8d2a57b2fc6e7853125d4',
-  'spirv_headers_revision': 'a3fdfe81465d57efc97cfd28ac6c8190fb31a6c8',
-  'spirv_tools_revision': 'ef3290bbea35935ba8fd623970511ed9f045bbd7',
+  'spirv_headers_revision': 'dafead1765f6c1a5f9f8a76387dcb2abe4e54acd',
+  'spirv_tools_revision': 'c2d5375fa7cc87c93f692e7200d5d974283d4391',
 }
 
 deps = {
diff --git a/glslc/src/dependency_info.cc b/glslc/src/dependency_info.cc
index 2622629..2f1ef2f 100644
--- a/glslc/src/dependency_info.cc
+++ b/glslc/src/dependency_info.cc
@@ -19,7 +19,7 @@
 #include <sstream>
 
 #include "file.h"
-#include "libshaderc_util/io.h"
+#include "libshaderc_util/io_shaderc.h"
 
 namespace glslc {
 
diff --git a/glslc/src/file_compiler.cc b/glslc/src/file_compiler.cc
index 5d67be1..111b18b 100644
--- a/glslc/src/file_compiler.cc
+++ b/glslc/src/file_compiler.cc
@@ -28,7 +28,7 @@
 #include "file_includer.h"
 #include "shader_stage.h"
 
-#include "libshaderc_util/io.h"
+#include "libshaderc_util/io_shaderc.h"
 #include "libshaderc_util/message.h"
 
 namespace {
diff --git a/glslc/src/file_includer.cc b/glslc/src/file_includer.cc
index 448bfba..eab629b 100644
--- a/glslc/src/file_includer.cc
+++ b/glslc/src/file_includer.cc
@@ -17,7 +17,7 @@
 #include <mutex>
 #include <utility>
 
-#include "libshaderc_util/io.h"
+#include "libshaderc_util/io_shaderc.h"
 
 namespace glslc {
 
diff --git a/glslc/src/main.cc b/glslc/src/main.cc
index 2b1c03e..c1467fe 100644
--- a/glslc/src/main.cc
+++ b/glslc/src/main.cc
@@ -28,7 +28,7 @@
 #include "file_compiler.h"
 #include "libshaderc_util/args.h"
 #include "libshaderc_util/compiler.h"
-#include "libshaderc_util/io.h"
+#include "libshaderc_util/io_shaderc.h"
 #include "libshaderc_util/string_piece.h"
 #include "resource_parse.h"
 #include "shader_stage.h"
diff --git a/libshaderc_util/Android.mk b/libshaderc_util/Android.mk
index a694787..ade568c 100644
--- a/libshaderc_util/Android.mk
+++ b/libshaderc_util/Android.mk
@@ -21,7 +21,7 @@
 LOCAL_SRC_FILES:=src/args.cc \
                 src/compiler.cc \
 		src/file_finder.cc \
-		src/io.cc \
+		src/io_shaderc.cc \
 		src/message.cc \
 		src/resources.cc \
 		src/shader_stage.cc \
diff --git a/libshaderc_util/CMakeLists.txt b/libshaderc_util/CMakeLists.txt
index 48f9991..99ce3c4 100644
--- a/libshaderc_util/CMakeLists.txt
+++ b/libshaderc_util/CMakeLists.txt
@@ -18,7 +18,7 @@
   include/libshaderc_util/counting_includer.h
   include/libshaderc_util/file_finder.h
   include/libshaderc_util/format.h
-  include/libshaderc_util/io.h
+  include/libshaderc_util/io_shaderc.h
   include/libshaderc_util/mutex.h
   include/libshaderc_util/message.h
   include/libshaderc_util/resources.h
@@ -29,7 +29,7 @@
   src/args.cc
   src/compiler.cc
   src/file_finder.cc
-  src/io.cc
+  src/io_shaderc.cc
   src/message.cc
   src/resources.cc
   src/shader_stage.cc
@@ -57,7 +57,7 @@
     string_piece
     format
     file_finder
-    io
+    io_shaderc
     message
     mutex
     version_profile)
@@ -85,5 +85,5 @@
 
 if(${SHADERC_ENABLE_TESTS})
   add_dependencies(shaderc_util_file_finder_test testdata)
-  add_dependencies(shaderc_util_io_test testdata)
+  add_dependencies(shaderc_util_io_shaderc_test testdata)
 endif()
diff --git a/libshaderc_util/include/libshaderc_util/io.h b/libshaderc_util/include/libshaderc_util/io_shaderc.h
similarity index 100%
rename from libshaderc_util/include/libshaderc_util/io.h
rename to libshaderc_util/include/libshaderc_util/io_shaderc.h
diff --git a/libshaderc_util/src/compiler.cc b/libshaderc_util/src/compiler.cc
index bf06589..051558b 100644
--- a/libshaderc_util/src/compiler.cc
+++ b/libshaderc_util/src/compiler.cc
@@ -22,7 +22,7 @@
 
 #include "SPIRV/GlslangToSpv.h"
 #include "libshaderc_util/format.h"
-#include "libshaderc_util/io.h"
+#include "libshaderc_util/io_shaderc.h"
 #include "libshaderc_util/message.h"
 #include "libshaderc_util/resources.h"
 #include "libshaderc_util/shader_stage.h"
diff --git a/libshaderc_util/src/io.cc b/libshaderc_util/src/io_shaderc.cc
similarity index 98%
rename from libshaderc_util/src/io.cc
rename to libshaderc_util/src/io_shaderc.cc
index 42ae89d..dc2a53a 100644
--- a/libshaderc_util/src/io.cc
+++ b/libshaderc_util/src/io_shaderc.cc
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "libshaderc_util/io.h"
+#include "libshaderc_util/io_shaderc.h"
 
 #include "libshaderc_util/universal_unistd.h"
 
@@ -24,6 +24,7 @@
 #endif
 
 #include <errno.h>
+
 #include <cstdio>
 #include <cstring>
 #include <fstream>
@@ -105,7 +106,7 @@
     stream = file_stream;
     if (file_stream->fail()) {
       *err << "glslc: error: cannot open output file: '" << output_filename
-                << "'";
+           << "'";
       if (access(output_filename.str().c_str(), W_OK) != 0) {
         OutputFileErrorMessage(errno);
         return nullptr;
diff --git a/libshaderc_util/src/io_test.cc b/libshaderc_util/src/io_shaderc_test.cc
similarity index 97%
rename from libshaderc_util/src/io_test.cc
rename to libshaderc_util/src/io_shaderc_test.cc
index 0f605dc..638e15e 100644
--- a/libshaderc_util/src/io_test.cc
+++ b/libshaderc_util/src/io_shaderc_test.cc
@@ -12,19 +12,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "libshaderc_util/io.h"
-
-#include <fstream>
+#include "libshaderc_util/io_shaderc.h"
 
 #include <gmock/gmock.h>
 
+#include <fstream>
+
 namespace {
 
+using shaderc_util::GetBaseFileName;
+using shaderc_util::GetOutputStream;
 using shaderc_util::IsAbsolutePath;
 using shaderc_util::ReadFile;
 using shaderc_util::WriteFile;
-using shaderc_util::GetOutputStream;
-using shaderc_util::GetBaseFileName;
 using testing::Eq;
 using testing::HasSubstr;
 
@@ -90,8 +90,7 @@
 
 TEST_F(ReadFileTest, CorrectContent) {
   ASSERT_TRUE(ReadFile("include_file.1", &read_data));
-  EXPECT_EQ("The quick brown fox jumps over a lazy dog.",
-            ToString(read_data));
+  EXPECT_EQ("The quick brown fox jumps over a lazy dog.", ToString(read_data));
 }
 
 TEST_F(ReadFileTest, EmptyContent) {
diff --git a/license-checker.cfg b/license-checker.cfg
index 0e00206..7afc70d 100644
--- a/license-checker.cfg
+++ b/license-checker.cfg
@@ -1,6 +1,6 @@
 [
     {
-        "licenses": [ "Apache-2.0-Header" ],
+        "licenses": [ "Apache-2.0" ],
         "paths": [
             {
                 "exclude": [
@@ -33,4 +33,4 @@
             { "include": [ "utils/git-sync-deps" ] }
         ]
     }
-]
\ No newline at end of file
+]