diff --git a/.gitmodules b/.gitmodules
index 59ee1f9..238ede9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,5 +2,5 @@
 	path = ucwmac
 	url = git://git.ucw.cz/ucwmac.git
 [submodule "src/formatitko/katex-server"]
-	path = src/formatitko/katex-server
+	path = src/formatitko/katex_server
 	url = https://gitea.ks.matfyz.cz:/KSP/formatitko-katex-server
diff --git a/pyproject.toml b/pyproject.toml
index 2466026..370d46e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,11 +33,19 @@ dependencies = [
 [project.scripts]
 formatitko = "formatitko.formatitko:main"
 
+[tool.setuptools.package-data]
+"formatitko.katex_server" = [
+    "*",
+    "node_modules/*",
+    "node_modules/katex/*",
+    "node_modules/katex/src/*",
+    "node_modules/katex/dist/*",
+]
+
 [tool.setuptools_scm]
 
 [tool.setuptools.packages.find]
 where = ["src"]
-exclude = ["src/formatitko/katex-server/node_modules"]
 
 [tool.pyright]
 strictParameterNoneValue = false
diff --git a/src/formatitko/katex.py b/src/formatitko/katex.py
index f81db24..c6a62f6 100644
--- a/src/formatitko/katex.py
+++ b/src/formatitko/katex.py
@@ -46,20 +46,20 @@ class KatexClient:
 			srcdir = os.path.dirname(os.path.realpath(__file__))
 
 			# Test if `node_modules` directory exists and if not, run `npm install`
-			if not os.path.isdir(srcdir + "/katex-server/node_modules"):
+			if not os.path.isdir(srcdir + "/katex_server/node_modules"):
 				print("Installing node dependencies for the first time...")
 				npm = shutil.which("npm") or shutil.which("yarnpkg")
 				if npm is None:
 					raise NPMNotFoundError("npm not found. Node.js is required to use KaTeX.")
-				subprocess.run([npm, "install"], cwd=srcdir+"/katex-server", check=True)
+				subprocess.run([npm, "install"], cwd=srcdir+"/katex_server", check=True)
 			
-			self._katex_server_path = srcdir + "/katex-server/index.mjs"
+			self._katex_server_path = srcdir + "/katex_server/index.mjs"
 
 		self._server_process = subprocess.Popen(["node", self._katex_server_path, self._socket_file], stdout=subprocess.PIPE)
 
 		ok = self._server_process.stdout.readline()
 		if ok != b"OK\n":
-			raise KatexServerError("Failed to connect to katex-server")
+			raise KatexServerError("Failed to connect to katex_server")
 
 	def connect(self):
 		self._client = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
diff --git a/src/formatitko/katex-server b/src/formatitko/katex_server
similarity index 100%
rename from src/formatitko/katex-server
rename to src/formatitko/katex_server