diff --git a/Instruction-Set.md b/Instruction-Set.md
index 7d7be4d..1992771 100644
--- a/Instruction-Set.md
+++ b/Instruction-Set.md
@@ -19,10 +19,11 @@
 | **JNZ** *target* | *mem/reg/imm* | 0x0D |`- - - - -` |
 | **JZ** *target* | *mem/reg/imm* |  0x0E |`- - - - -` |
 | **MOV** *destination*, *source* | *mem/reg*, *mem/reg/imm* |0x01 |`- - - - -` |
+
 | **MUL** *source* | *mem/reg/imm* |  0x17 |`X - - X -` |
 | **NEG** *destination* | *mem/reg* |  0x19 |`1 X X X -`* |
 | **NOP**  | *None* |  0x3F |`- - - - -` |
-| **NOT** *destination* | *mem/reg* |  TODO |`- - - - -` |
+| **NOT** *destination* | *mem/reg* |  0x1D |`- - - - -` |
 | **OR** *destination*, *source* | *mem/reg*, *mem/reg/imm* | 0x05 |`0 X X 0 -` |
 | **POP** *destination* | *mem/reg* | 0x14 |`- - - - -` |
 | **PUSH** *source* | *mem/reg/imm* | 0x13 |`- - - - -` |