diff --git a/Cargo.toml b/Cargo.toml
index 3eceda6..e28cbc4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,6 +15,8 @@ keywords = ["ros2", "colcon", "ament"]
 [dependencies]
 anyhow = "1"
 cargo-manifest = "0.17"
+# NOTE(esteve): needed to make sure we can compile with rustc 1.75
+indexmap = "<2.12.0"
 pico-args = "0.4"
 
 # The profile that 'cargo dist' will build with