diff --git a/episode/9/rust/pascal/Cargo.lock b/episode/9/rust/pascal/Cargo.lock
index 98a3611..cad585d 100644
--- a/episode/9/rust/pascal/Cargo.lock
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diff --git a/episode/9/rust/pascal/Cargo.toml b/episode/9/rust/pascal/Cargo.toml
index 1e2419f..85e7407 100644
--- a/episode/9/rust/pascal/Cargo.toml
+++ b/episode/9/rust/pascal/Cargo.toml
@@ -6,4 +6,4 @@ authors = ["Matthias Endler <matthias-endler@gmx.net>"]
 [dependencies]
 rayon = "1.0.2"
 structopt = "0.2.10"
-im = "12.0.0"
+im = "15.1.0"