diff --git a/crates/arena/src/lib.rs b/crates/arena/src/lib.rs
index 278178265a4..bbb04a26d84 100644
--- a/crates/arena/src/lib.rs
+++ b/crates/arena/src/lib.rs
@@ -1,2 +1,3 @@
+#![forbid(unsafe_code)]
 // For now we use a wrapper around generational-arena
 pub use generational_arena::{Arena, Index};
diff --git a/crates/fm/src/lib.rs b/crates/fm/src/lib.rs
index ebc3d7021a8..c365f578c4a 100644
--- a/crates/fm/src/lib.rs
+++ b/crates/fm/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 mod file_map;
 mod file_reader;
 
diff --git a/crates/iter-extended/src/lib.rs b/crates/iter-extended/src/lib.rs
index b840dc1c9b3..b5729c9a895 100644
--- a/crates/iter-extended/src/lib.rs
+++ b/crates/iter-extended/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 use std::collections::BTreeMap;
 
 /// Equivalent to .into_iter().map(f).collect::<Vec<_>>()
diff --git a/crates/nargo/src/lib.rs b/crates/nargo/src/lib.rs
index 526f7be373f..fd001dd3e98 100644
--- a/crates/nargo/src/lib.rs
+++ b/crates/nargo/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 use noirc_frontend::graph::CrateType;
 use std::path::{Path, PathBuf};
 
diff --git a/crates/noirc_abi/src/lib.rs b/crates/noirc_abi/src/lib.rs
index 821cb663912..7d8bc645102 100644
--- a/crates/noirc_abi/src/lib.rs
+++ b/crates/noirc_abi/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 use std::{collections::BTreeMap, convert::TryInto, str};
 
 use acvm::FieldElement;
diff --git a/crates/noirc_driver/src/lib.rs b/crates/noirc_driver/src/lib.rs
index a4f5839dd05..7f2de00b85a 100644
--- a/crates/noirc_driver/src/lib.rs
+++ b/crates/noirc_driver/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 use acvm::acir::circuit::Circuit;
 
 use acvm::Language;
diff --git a/crates/noirc_errors/src/lib.rs b/crates/noirc_errors/src/lib.rs
index efde37d9803..99dd6554dbb 100644
--- a/crates/noirc_errors/src/lib.rs
+++ b/crates/noirc_errors/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 mod position;
 pub mod reporter;
 pub use position::{Location, Position, Span, Spanned};
diff --git a/crates/noirc_evaluator/src/lib.rs b/crates/noirc_evaluator/src/lib.rs
index 8d7d78219b4..a4b81469f2d 100644
--- a/crates/noirc_evaluator/src/lib.rs
+++ b/crates/noirc_evaluator/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 mod errors;
 mod ssa;
 
diff --git a/crates/noirc_frontend/src/lib.rs b/crates/noirc_frontend/src/lib.rs
index 64b98c64eb3..2db27b62879 100644
--- a/crates/noirc_frontend/src/lib.rs
+++ b/crates/noirc_frontend/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 pub mod ast;
 pub mod graph;
 pub mod lexer;
diff --git a/crates/wasm/src/lib.rs b/crates/wasm/src/lib.rs
index da1394f79cb..b66876ae682 100644
--- a/crates/wasm/src/lib.rs
+++ b/crates/wasm/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 use acvm::acir::circuit::Circuit;
 use gloo_utils::format::JsValueSerdeExt;
 use std::path::PathBuf;