diff --git a/crates/aiken-lang/src/gen_uplc.rs b/crates/aiken-lang/src/gen_uplc.rs
index d6f4c4b6..588edc00 100644
--- a/crates/aiken-lang/src/gen_uplc.rs
+++ b/crates/aiken-lang/src/gen_uplc.rs
@@ -217,10 +217,8 @@ impl<'a> CodeGenerator<'a> {
 
     fn finalize(&mut self, mut term: Term<Name>) -> Program<Name> {
         term = self.special_functions.apply_used_functions(term);
-        println!("PROG BEFORE IS  {}", term.to_pretty());
-        let program = aiken_optimize_and_intern(self.new_program(term));
 
-        println!("PROG IS {}", program.to_pretty());
+        let program = aiken_optimize_and_intern(self.new_program(term));
 
         // This is very important to call here.
         // If this isn't done, re-using the same instance
diff --git a/crates/aiken-project/src/tests/gen_uplc.rs b/crates/aiken-project/src/tests/gen_uplc.rs
index a5129296..73f91e23 100644
--- a/crates/aiken-project/src/tests/gen_uplc.rs
+++ b/crates/aiken-project/src/tests/gen_uplc.rs
@@ -64,7 +64,6 @@ fn assert_uplc(source_code: &str, expected: Term<Name>, should_fail: bool, verbo
                 version: (1, 1, 0),
                 term: expected,
             };
-            println!("BEFORE OPT IS {}", expected.to_pretty());
 
             let expected = optimize::aiken_optimize_and_intern(expected);
 
diff --git a/crates/uplc/src/optimize/shrinker.rs b/crates/uplc/src/optimize/shrinker.rs
index 0b37631d..5d6b6010 100644
--- a/crates/uplc/src/optimize/shrinker.rs
+++ b/crates/uplc/src/optimize/shrinker.rs
@@ -90,8 +90,8 @@ pub const NO_INLINE: &str = "__no_inline__";
 #[derive(PartialEq, PartialOrd, Default, Debug, Clone)]
 pub struct VarLookup {
     found: bool,
-    occurrences: isize,
-    delays: isize,
+    occurrences: usize,
+    delays: usize,
     no_inline: bool,
 }
 
@@ -123,7 +123,7 @@ impl VarLookup {
         }
     }
 
-    pub fn delay_if_found(self, delay_amount: isize) -> Self {
+    pub fn delay_if_found(self, delay_amount: usize) -> Self {
         if self.found {
             Self {
                 found: self.found,
@@ -1113,7 +1113,7 @@ impl Term<Name> {
                 }
             }
             Term::Delay(body) => {
-                let not_forced = isize::from(force_stack.pop().is_none());
+                let not_forced = usize::from(force_stack.pop().is_none());
 
                 body.var_occurrences(search_for, arg_stack, force_stack)
                     .delay_if_found(not_forced)
@@ -1130,7 +1130,7 @@ impl Term<Name> {
                 {
                     VarLookup::new()
                 } else {
-                    let not_applied: isize = isize::from(arg_stack.pop().is_none());
+                    let not_applied = usize::from(arg_stack.pop().is_none());
                     body.var_occurrences(search_for, arg_stack, force_stack)
                         .delay_if_found(not_applied)
                 }