diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 7efb9c5..87ca7a4 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,4 +5,5 @@ build:
     - mkdir -p bin
     - curl -sSL "https://github.com/rust-lang/mdBook/releases/download/v0.4.37/mdbook-v0.4.37-x86_64-unknown-linux-gnu.tar.gz" | tar -xvz --directory "bin"
     - mkdir -p $READTHEDOCS_OUTPUT/html
+    - echo "site-url = \"/$READTHEDOCS_LANGUAGE/$READTHEDOCS_VERSION/\"" >> doc/book.toml
     - bin/mdbook build doc --dest-dir=$READTHEDOCS_OUTPUT/html
diff --git a/doc/book.toml b/doc/book.toml
index 26aa279..98ef892 100644
--- a/doc/book.toml
+++ b/doc/book.toml
@@ -4,9 +4,6 @@ multilingual = false
 src = "src"
 title = "Glotzerlab-software documentation"
 
-[output.html]
-git-repository-url = "https://github.com/glotzerlab/software"
-
 [build]
 create-missing = false
 
@@ -14,3 +11,7 @@ create-missing = false
 # You also need to install https://github.com/Michael-F-Bryan/mdbook-linkcheck.
 # [output.linkcheck]
 # follow-web-links = true
+
+# [output.html] must be the last table so that .readthedocs.yaml can easily add a key to it
+[output.html]
+git-repository-url = "https://github.com/glotzerlab/software"