diff --git a/requirements/geovista.yml b/requirements/geovista.yml
index 1102b212..ed94b99e 100644
--- a/requirements/geovista.yml
+++ b/requirements/geovista.yml
@@ -41,6 +41,7 @@ dependencies:
 
 # examples dependencies (optional)
   - fastparquet
+  - h3-py
   - pandas
 
 # documentation dependencies (optional)
diff --git a/requirements/pypi-optional-exam.txt b/requirements/pypi-optional-exam.txt
index 553538e6..3a945489 100644
--- a/requirements/pypi-optional-exam.txt
+++ b/requirements/pypi-optional-exam.txt
@@ -1,2 +1,3 @@
 fastparquet
+h3
 pandas