diff --git a/Cargo.toml b/Cargo.toml
index af87631..906a47e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,6 +12,7 @@ readme = "README.md"
 
 [lints]
 clippy.all = "deny"
+clippy.default_numeric_fallback = "deny"
 clippy.pedantic = "deny"
 rust.warnings = "deny"
 
diff --git a/src/main.rs b/src/main.rs
index 7238ab4..89a529d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -63,7 +63,7 @@ impl Threshold {
                             )
                         })
                         .and_then(|f| {
-                            if f.is_normal() && (0.0..=100.0).contains(&f) {
+                            if f.is_normal() && (0.0_f64..=100.0_f64).contains(&f) {
                                 Ok(f)
                             } else {
                                 Err(io::Error::new(