diff --git a/.gitmodules b/.gitmodules
index cd1bbfc7..aba5d052 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -73,3 +73,6 @@
 [submodule "sublime/syntaxes/extra/sublime-zig-language"]
 	path = sublime/syntaxes/extra/sublime-zig-language
 	url = https://github.com/ziglang/sublime-zig-language.git
+[submodule "sublime/syntaxes/extra/protobuf-syntax-highlighting"]
+	path = sublime/syntaxes/extra/protobuf-syntax-highlighting
+	url = https://github.com/VcamX/protobuf-syntax-highlighting.git
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac3a5220..65743edb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,7 +25,7 @@
 - Add the `base16-aterlierdune-light` syntax highlight theme
 - Improve link checking: less concurrency and try to not overload the servers
 - Allow using POST for `load_data`, along with a body to POST and allow it to fail
-- Add Zig syntax highlighting
+- Add Zig and Protobuf syntax highlighting
 - Footnotes links are now stripped from summaries - they were not linking to anything.
 
 ## 0.13.0 (2021-01-09)
diff --git a/docs/content/documentation/content/syntax-highlighting.md b/docs/content/documentation/content/syntax-highlighting.md
index e35241b1..6e0e5fa6 100644
--- a/docs/content/documentation/content/syntax-highlighting.md
+++ b/docs/content/documentation/content/syntax-highlighting.md
@@ -113,6 +113,8 @@ Here is a full list of supported languages and their short names:
 - PHP -> ["php", "php3", "php4", "php5", "php7", "phps", "phpt", "phtml"]
 - Plain Text -> ["txt"]
 - PowerShell -> ["ps1", "psd1", "psm1"]
+- Protocol Buffer -> ["proto", "protodevel"]
+- Protocol Buffer (TEXT) -> ["pb.txt", "pbtxt", "proto.text", "prototxt", "textpb"]
 - PureScript -> ["purs"]
 - Python -> ["SConscript", "SConstruct", "Sconstruct", "Snakefile", "bazel", "bzl", "cpy", "gyp", "gypi", "pxd", "pxd.in", "pxi", "pxi.in", "py", "py3", "pyi", "pyw", "pyx", "pyx.in", "rpy", "sconstruct", "vpy", "wscript"]
 - R -> ["R", "Rprofile", "r"]
diff --git a/sublime/syntaxes/extra/protobuf-syntax-highlighting b/sublime/syntaxes/extra/protobuf-syntax-highlighting
new file mode 160000
index 00000000..726e21d7
--- /dev/null
+++ b/sublime/syntaxes/extra/protobuf-syntax-highlighting
@@ -0,0 +1 @@
+Subproject commit 726e21d74dac23cbb036f2fbbd626decdc954060
diff --git a/sublime/syntaxes/newlines.packdump b/sublime/syntaxes/newlines.packdump
index 259015ae..14f70269 100644
Binary files a/sublime/syntaxes/newlines.packdump and b/sublime/syntaxes/newlines.packdump differ