diff --git a/rules.mk b/rules.mk
index b31c531..6b9ef75 100644
--- a/rules.mk
+++ b/rules.mk
@@ -15,6 +15,8 @@ MODULE_RUSTFLAGS += \
 
 MODULE_LIBRARY_DEPS := \
 	external/rust/crates/der \
+	external/rust/crates/pkcs8 \
 	external/rust/crates/spki \
+	external/rust/crates/zeroize \
 
 include make/library.mk