-One subtree is used for this program:
- ```git subtree add -P src/be/nikiroo/utils git@github.com:nikiroo/nikiroo-utils.git subtree```
+# The subtrees used for this program:
+# ```git subtree add -P src/be/nikiroo/utils git@github.com:nikiroo/nikiroo-utils.git subtree```
+# ```git subtree add -P src/jexer git@github.com:nikiroo/jexer.git subtree```
+
+# Update all subtrees:
+
+git subtree pull -P src/be/nikiroo/utils git@github.com:nikiroo/nikiroo-utils.git subtree
+git subtree pull -P src/jexer git@github.com:nikiroo/jexer.git subtree