diff --git a/src/cpu.ml b/src/cpu.ml
index 9cfc9a7..b51ee60 100644
--- a/src/cpu.ml
+++ b/src/cpu.ml
@@ -189,24 +189,22 @@ let run cpu (mem: Memory.map) =
   | '\x20' -> let n = read_pc_byte cpu mem in
               let s = Bit.signed_byte n in
               let inst = sprintf "JR \tNZ, 0x%02X (%d)" n s in
-              if cpu.flag.z = false then (
+              if cpu.flag.z = false then begin
                 inc_pc cpu (s - 2); (* we read 2 bytes from PC, opcode and n *)
                 inst, 12
-              ) else (
+              end else
                 inst, 8
-              )
 
   | '\xC9' -> let inst = sprintf "RET" in
               cpu.reg.pc <- pop_stack cpu mem;
               inst, 16
 
   | '\xC0' -> let inst = sprintf "RET \tNZ" in
-              if cpu.flag.z = false then (
+              if cpu.flag.z = false then begin
                 cpu.reg.pc <- pop_stack cpu mem;
                 inst, 20
-              ) else (
+              end else
                 inst, 8
-              )
 
 
 
@@ -250,12 +248,11 @@ let run cpu (mem: Memory.map) =
 
   | '\x28' -> let n = read_pc_byte cpu mem in
               let inst = sprintf "JR \tZ, 0x%02X" n in
-              if cpu.flag.z = true then (
+              if cpu.flag.z = true then begin
                 inc_pc cpu (n - 1);
                 inst, 12
-              ) else (
+              end else 
                 inst, 8
-              )
 
   | '\x34' -> let inst = sprintf "INC \t(HL)" in
               let hl = merge_bytes cpu.reg.l cpu.reg.h in
diff --git a/src/memory.ml b/src/memory.ml
index c21d961..23ebfd8 100644
--- a/src/memory.ml
+++ b/src/memory.ml
@@ -99,11 +99,11 @@ let update_timers mem cycles =
   if should_inc_div then ignore (inc mem.map gDIV);
 
   let should_inc_tima = Timer.update mem.tima cycles in
-  if should_inc_tima then (
+  if should_inc_tima then begin
     let overflow = inc mem.map gTIMA in
-    if overflow then (
+    if overflow then begin
       let tma = get mem.map gTMA in
       set mem.map gTIMA tma
       (* TODO: INT 50 - Timer interupt *)
-    )
-  )
+    end
+  end
diff --git a/src/oboy.ml b/src/oboy.ml
index 8f85de2..f333dbd 100644
--- a/src/oboy.ml
+++ b/src/oboy.ml
@@ -16,7 +16,7 @@ let rec run (cpu: Cpu.t) (mem: Memory.t) (screen: Screen.t) =
   printf "start %f\n" start;
 
   let rec run_for cpu (mem: Memory.t) cycles_remaining =
-    if cycles_remaining > 0 then (
+    if cycles_remaining > 0 then begin
       printf "\n";
       let inst, cycles = Cpu.run cpu mem.map in
       printf "[Instruction] %s\n" inst;
@@ -24,7 +24,7 @@ let rec run (cpu: Cpu.t) (mem: Memory.t) (screen: Screen.t) =
       Memory.update_timers mem cycles;
 
       run_for cpu mem (cycles_remaining - cycles)
-    )
+    end
   in
   run_for cpu mem cycles_per_frame;
 
@@ -59,11 +59,11 @@ let power_up cartridge =
 
 
 let () =
-  if Array.length Sys.argv < 2 then (
+  if Array.length Sys.argv < 2 then begin
     prerr_endline "Please specify a ROM.";
     eprintf "Usage: %s path/to/rom\n" Sys.argv.(0);
     exit 1;
-  );
+  end;
 
   let cartridge = Cartridge.read_cartridge Sys.argv.(1) in
   match cartridge with