diff --git a/spirq-core/src/parse/instr.rs b/spirq-core/src/parse/instr.rs
index 28ca541..50d7934 100644
--- a/spirq-core/src/parse/instr.rs
+++ b/spirq-core/src/parse/instr.rs
@@ -1,6 +1,5 @@
 //!  SPIR-V instruction parser.
 use anyhow::bail;
-use num_traits::FromPrimitive;
 use spirv::Op;
 use std::{borrow::Borrow, fmt, ops::Deref};
 
diff --git a/spirq-spvasm/scripts/generate_decorate_parameter_enum_type.py b/spirq-spvasm/scripts/generate_decorate_parameter_enum_type.py
index 7f11299..af7c840 100644
--- a/spirq-spvasm/scripts/generate_decorate_parameter_enum_type.py
+++ b/spirq-spvasm/scripts/generate_decorate_parameter_enum_type.py
@@ -37,7 +37,6 @@
 
 out += [
     "use anyhow::{bail, Result};",
-    "use num_traits::FromPrimitive;",
     "use spirq_core::spirv::Op;",
     "",
     "fn unknown_decorate_parameter_index(decoration: u32, i: usize) -> Result<&'static str> {",
diff --git a/spirq-spvasm/src/generated/decorate_parameter_enum_type.rs b/spirq-spvasm/src/generated/decorate_parameter_enum_type.rs
index 65fd2e9..b608ed6 100644
--- a/spirq-spvasm/src/generated/decorate_parameter_enum_type.rs
+++ b/spirq-spvasm/src/generated/decorate_parameter_enum_type.rs
@@ -1,5 +1,4 @@
 use anyhow::{bail, Result};
-use num_traits::FromPrimitive;
 use spirq_core::spirv::Op;
 
 fn unknown_decorate_parameter_index(decoration: u32, i: usize) -> Result<&'static str> {
diff --git a/spirq/src/reflect.rs b/spirq/src/reflect.rs
index f53a5f1..694da9f 100644
--- a/spirq/src/reflect.rs
+++ b/spirq/src/reflect.rs
@@ -3,7 +3,6 @@ use std::collections::BTreeMap;
 use std::convert::TryFrom;
 
 use fnv::{FnvHashMap as HashMap, FnvHashSet as HashSet};
-use num_traits::FromPrimitive;
 use spirq_core::parse::Instrs;
 
 use crate::{