diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 65047b46..07eb81c9 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,7 +1,7 @@
 version: 2
 
 build:
-  os: ubuntu-22.04
+  os: "ubuntu-22.04"
   tools:
     python: "3.10"
 
@@ -10,8 +10,8 @@ sphinx:
 
 python:
   install:
+    - requirements: docs/source/requirements.txt
     - method: pip
       path: .
       extra_requirements:
-        - docs
-        - sphinx-copybutton
\ No newline at end of file
+        - docs
\ No newline at end of file
diff --git a/docs/source/requirements.txt b/docs/source/requirements.txt
new file mode 100644
index 00000000..c8203d0f
--- /dev/null
+++ b/docs/source/requirements.txt
@@ -0,0 +1,3 @@
+sphinx-book-theme==1.0.1
+sphinx-copybutton==0.5.2
+sphinx-design==0.5.0
\ No newline at end of file