diff --git a/docs/demo/poisson.md b/docs/demo/poisson.md
index 6423c7f..eaf3819 100644
--- a/docs/demo/poisson.md
+++ b/docs/demo/poisson.md
@@ -5,7 +5,7 @@ Example
 
 ```scala mdoc
 import ai.dragonfly.math.stats.probability.distributions.Poisson
-import ai.dragonfly.math.vector.*
+import narr.*
 
 val dist1 = Poisson(1)
 for (i <- 0 to 5) {