diff --git a/hbvm/src/vm/mod.rs b/hbvm/src/vm/mod.rs
index 69fe6b6..40b4d62 100644
--- a/hbvm/src/vm/mod.rs
+++ b/hbvm/src/vm/mod.rs
@@ -36,7 +36,7 @@ macro_rules! load {
         *$self.reg_mut(tg) = $self
             .memory
             .load::<$size>($self.reg(a0).int() + offset)
-            .unwrap();
+            .ok_or(Exception::LoadAccess)?;
     }};
 }
 
@@ -46,7 +46,7 @@ macro_rules! store {
         $self
             .memory
             .store::<$size>($self.reg(a0).int() + offset, *$self.reg(src))
-            .unwrap();
+            .map_err(|_| Exception::StoreAccess)?;
     }};
 }
 
@@ -74,11 +74,11 @@ impl<'a> Vm<'a> {
         Ok(unsafe { Self::new_unchecked(program) })
     }
 
-    pub fn run(&mut self) {
+    pub fn run(&mut self) -> Result<(), Exception> {
         use hbbytecode::opcode::*;
         loop {
             let Some(&opcode) = self.program.get(self.pc)
-                else { return };
+                else { return Ok(()) };
 
             unsafe {
                 match opcode {