diff --git a/README.md b/README.md
index ad685b7..1932936 100644
--- a/README.md
+++ b/README.md
@@ -180,3 +180,6 @@ Adam Dennett’s [2018 paper](https://doi.org/10.37970/aps.v2i2.38).
 -   The
     [`mobility`](https://covid-19-mobility-data-network.github.io/mobility/index.html)
     R package
+-   The [gravity functions in the
+    scikit-mobility](https://scikit-mobility.github.io/scikit-mobility/reference/models.html#module-skmob.models.gravity)
+    Python package
diff --git a/README.qmd b/README.qmd
index 5bf00d8..d8ca2db 100644
--- a/README.qmd
+++ b/README.qmd
@@ -123,3 +123,4 @@ For a detailed introduction to SIMs, support by reproducible R code, see Adam De
 - The [`spint` Python package](https://spint.readthedocs.io/en/latest/)
 - The [`gravity`](https://cran.r-project.org/package=gravity) R package
 - The [`mobility`](https://covid-19-mobility-data-network.github.io/mobility/index.html) R package
+- The [gravity functions in the scikit-mobility](https://scikit-mobility.github.io/scikit-mobility/reference/models.html#module-skmob.models.gravity) Python package