diff --git a/uniswap/constants.py b/uniswap/constants.py
index d7a7ee45..7643b3d9 100644
--- a/uniswap/constants.py
+++ b/uniswap/constants.py
@@ -6,6 +6,7 @@
     1: "mainnet",
     3: "ropsten",
     4: "rinkeby",
+    42: "kovan",
     56: "binance",
     97: "binance_testnet",
     100: "xdai",
@@ -26,6 +27,7 @@
     "mainnet": "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f",
     "ropsten": "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f",
     "rinkeby": "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f",
+    "kovan": "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f",
     "görli": "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f",
     "xdai": "0xA818b4F111Ccac7AA31D0BCc0806d64F2E0737D7",
     "binance": "0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73",
@@ -35,6 +37,7 @@
     "mainnet": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
     "ropsten": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
     "rinkeby": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
+    "kovan": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
     "görli": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
     "xdai": "0x1C232F01118CB8B424793ae03F870aa7D0ac7f77",
     "binance": "0x10ED43C718714eb63d5aA57B78B54704E256024E",