diff --git a/doc/packages.md b/doc/packages.md
index 7c87756..cb4a9b8 100644
--- a/doc/packages.md
+++ b/doc/packages.md
@@ -79,6 +79,7 @@ Source: [`requirements/site-packages-base.txt`](../requirements/site-packages-ba
 | entrypoints        | 0.4     |
 | fpdf               | 1.7.2   |
 | joblib             | 1.3.2   |
+| pluggy             | 1.6.0   |
 
 ## Extra Packages
 
@@ -140,3 +141,9 @@ Source: [`requirements/site-packages-extra.txt`](../requirements/site-packages-e
 | typing_inspect   | —       |
 | wrapt            | 2.0.1   |
 | plumbum          | 1.9.0   |
+
+### Locale and ISO data
+
+| Package   | Version |
+| --------- | ------- |
+| pycountry | 26.2.16 |
diff --git a/requirements/site-packages-extra.txt b/requirements/site-packages-extra.txt
index 5dc133d..7bff599 100644
--- a/requirements/site-packages-extra.txt
+++ b/requirements/site-packages-extra.txt
@@ -55,6 +55,7 @@ more-itertools
 mypy_extensions
 pyaes
 platformdirs
+pycountry==26.2.16
 python-dotenv
 rich
 smart-open==7.5.0
diff --git a/tests/func/test_110_pycountry.py b/tests/func/test_110_pycountry.py
new file mode 100644
index 0000000..dfb9846
--- /dev/null
+++ b/tests/func/test_110_pycountry.py
@@ -0,0 +1,12 @@
+"""Test: pycountry"""
+import sys
+sys.stdout.reconfigure(line_buffering=True)
+try:
+    import pycountry
+    assert pycountry.countries.get(alpha_2="US").name == "United States"
+    assert pycountry.currencies.get(alpha_3="EUR").name == "Euro"
+    assert pycountry.languages.get(alpha_3="eng").name == "English"
+    print("pycountry: PASS")
+except Exception as e:
+    print(f"pycountry: FAIL: {e}")
+    sys.exit(1)