diff --git a/docs/conf.py b/docs/conf.py
index 1cb03063..2ac73ac7 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -42,8 +42,7 @@
     "sphinx.ext.intersphinx",
     "sphinx.ext.viewcode",
     "notfound.extension",
-    "sphinx_autodoc_typehints",
-    "sphinx_substitution_extensions"
+    "sphinx_autodoc_typehints"
 ]
 autodoc_member_order = "bysource"
 
@@ -201,7 +200,3 @@
 # -- Extension configuration -------------------------------------------------
 
 intersphinx_mapping = {"python": ("https://docs.python.org/3", None)}
-
-rst_prolog = """
-.. |pyngrok_version| replace:: {pyngrok_version}
-""".format(pyngrok_version=version)
diff --git a/docs/troubleshooting.rst b/docs/troubleshooting.rst
index 5a7c6216..98c34d28 100644
--- a/docs/troubleshooting.rst
+++ b/docs/troubleshooting.rst
@@ -15,7 +15,6 @@ your path. Running ``ngrok`` with no args from the command line should show ``py
 end.
 
 .. code-block:: shell
-   :substitutions:
 
     bash-3.2$ ngrok
     ngrok - tunnel local ports to public URLs and inspect traffic
@@ -26,7 +25,7 @@ end.
     ...
 
     PYNGROK VERSION:
-       |pyngrok_version|
+       7.1.5
 
 .. note::
 
diff --git a/pyproject.toml b/pyproject.toml
index 7987358d..532b5918 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,6 @@ docs = [
     "Sphinx",
     "sphinx-notfound-page",
     "sphinx_autodoc_typehints",
-    "sphinx-substitution-extensions",
     "mypy",
     "types-PyYAML"
 ]