diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 2f9fdbad..f92020c6 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.94.1"
+channel = "1.95.0"
 profile = "default"
diff --git a/src/simulation/investment.rs b/src/simulation/investment.rs
index 30777a30..0965df03 100644
--- a/src/simulation/investment.rs
+++ b/src/simulation/investment.rs
@@ -409,7 +409,7 @@ fn select_assets_for_cycle(
                 model.parameters.capacity_margin,
             )
             .run(
-                &format!("cycle ({markets_str}) post {commodity_id}|{region_id} investment",),
+                &format!("cycle ({markets_str}) post {commodity_id}|{region_id} investment"),
                 writer,
             )
             .with_context(|| {