diff --git a/justfile b/justfile
index f5dbea1..21bda8a 100644
--- a/justfile
+++ b/justfile
@@ -20,7 +20,8 @@ install-precommit:
 
 # Update the Quarto seedcase-theme extension
 update-quarto-theme:
-  quarto add seedcase-project/seedcase-theme --no-prompt
+  # Add theme if it doesn't exist, update if it does
+  quarto update seedcase-project/seedcase-theme --no-prompt
 
 # Update files in the template from the copier parent folder
 update-template:
diff --git a/template/justfile.jinja b/template/justfile.jinja
index ac39c56..805feac 100644
--- a/template/justfile.jinja
+++ b/template/justfile.jinja
@@ -28,7 +28,8 @@ install-precommit:
 {%- if is_seedcase_project %}
 # Update the Quarto seedcase-theme extension
 update-quarto-theme:
-  quarto add seedcase-project/seedcase-theme --no-prompt
+  # Add theme if it doesn't exist, update if it does
+  quarto update seedcase-project/seedcase-theme --no-prompt
 {%- endif %}
 
 # Install Python package dependencies