diff --git a/docs/conf.py b/docs/conf.py
index d65abb6..8e72781 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -35,6 +35,8 @@
     "sphinx.ext.extlinks",
     "sphinx_design",
     "sphinx_gmt.gmtplot",
+    'sphinx.ext.intersphinx',
+    'sphinxcontrib.youtube'
 ]
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -69,4 +71,4 @@
 html_css_files = ["style.css"]
 
 # Adjust highlight language for sphinx_gmt examples
-highlight_language = "bash"
+highlight_language = "bash"
\ No newline at end of file
diff --git a/environment.yml b/environment.yml
index b54d5ce..cb830f6 100644
--- a/environment.yml
+++ b/environment.yml
@@ -10,4 +10,4 @@ dependencies:
   - sphinx-design
   - sphinx_gmt
   - sphinx_rtd_theme
-  - sphinxcontrib-youtube
+  - sphinxcontrib-youtube
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index f15c8d3..761740f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ sphinx
 sphinx-design
 sphinx_gmt
 sphinx_rtd_theme
+sphinxcontrib-youtube==1.4.1
\ No newline at end of file