diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e00b39638d..be8a44f14d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -78,6 +78,7 @@ jobs:
           make test
 
           # run versiondb tests
+          nix registry add nixpkgs github:NixOS/nixpkgs/23.05
           nix profile install nixpkgs#rocksdb
           export PKG_CONFIG_PATH=$HOME/.nix-profile/lib/pkgconfig
           export CGO_CFLAGS="$(pkg-config --cflags rocksdb)" CGO_LDFLAGS="$(pkg-config --libs rocksdb)"
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 1810c66592..bea8652214 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -40,6 +40,7 @@ jobs:
             *.sum
       - name: run golangci-lint
         run: |
+          nix registry add nixpkgs github:NixOS/nixpkgs/23.05
           nix profile install nixpkgs#rocksdb nixpkgs#golangci-lint
           export PKG_CONFIG_PATH=$HOME/.nix-profile/lib/pkgconfig
           export CGO_CFLAGS="$(pkg-config --cflags rocksdb)" CGO_LDFLAGS="$(pkg-config --libs rocksdb)"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8153a8774..8e047f5d31 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
 
 - [#1058](https://github.com/crypto-org-chain/cronos/pull/1058) Fix decode log for multi topics in websocket subscribe ([ethermint commit](https://github.com/crypto-org-chain/ethermint/commit/2136ad029860c819942ad1836dd3f42585002233)).
 - [#1062](https://github.com/crypto-org-chain/cronos/pull/1062) Update cometbft `v0.34.29` with several minor bug fixes and low-severity security-fixes.
+- [#1102](https://github.com/crypto-org-chain/cronos/pull/1102) avoid duplicate cache events emitted from ibc and gravity hook.
 
 *Jun 9, 2023*
 
diff --git a/go.mod b/go.mod
index 5f15abcb42..95c84ed885 100644
--- a/go.mod
+++ b/go.mod
@@ -26,7 +26,6 @@ require (
 	github.com/tendermint/tendermint v0.34.28
 	github.com/tendermint/tm-db v0.6.7
 	golang.org/x/exp v0.0.0-20230310171629-522b1b587ee0
-	golang.org/x/sys v0.8.0
 	google.golang.org/genproto v0.0.0-20230323212658-478b75c54725
 	google.golang.org/grpc v1.54.0
 	google.golang.org/protobuf v1.30.0
@@ -208,6 +207,7 @@ require (
 	golang.org/x/net v0.10.0 // indirect
 	golang.org/x/oauth2 v0.6.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
 	golang.org/x/term v0.8.0 // indirect
 	golang.org/x/text v0.9.0 // indirect
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
diff --git a/integration_tests/test_gravity.py b/integration_tests/test_gravity.py
index 9b3c04c28e..a504eac900 100644
--- a/integration_tests/test_gravity.py
+++ b/integration_tests/test_gravity.py
@@ -1,6 +1,7 @@
 import json
 
 import pytest
+import requests
 import sha3
 import toml
 from dateutil.parser import isoparse
@@ -382,6 +383,17 @@ def check():
 
     wait_for_fn("check balance on cronos", check)
 
+    # check duplicate end_block_events
+    height = cli.block_height()
+    port = ports.rpc_port(gravity.cronos.base_port(0))
+    url = f"http://127.0.0.1:{port}/block_results?height={height}"
+    res = requests.get(url).json().get("result")
+    if res:
+        events = res["end_block_events"]
+        target = "ethereum_send_to_cosmos_handled"
+        count = sum(1 for evt in events if evt["type"] == target)
+        assert count <= 2, f"duplicate {target}"
+
 
 @pytest.mark.skip(reason="gravity-bridge not supported in v1.0.x")
 def test_direct_token_mapping(gravity):
diff --git a/integration_tests/test_ibc.py b/integration_tests/test_ibc.py
index 0862aa8639..1affeb98af 100644
--- a/integration_tests/test_ibc.py
+++ b/integration_tests/test_ibc.py
@@ -34,6 +34,21 @@ def get_balances(chain, addr):
     return chain.cosmos_cli().balances(addr)
 
 
+def find_duplicate(attributes):
+    res = set()
+    key = attributes[0]["key"]
+    for attribute in attributes:
+        if attribute["key"] == key:
+            value0 = attribute["value"]
+        elif attribute["key"] == "amount":
+            amount = attribute["value"]
+            value_pair = f"{value0}:{amount}"
+            if value_pair in res:
+                return value_pair
+            res.add(value_pair)
+    return None
+
+
 def test_ibc_transfer_with_hermes(ibc):
     """
     test ibc transfer tokens with hermes cli
@@ -65,6 +80,14 @@ def check_balance_change():
     # rather than the normal gas price
     assert fee == gas * 1000000
 
+    # check duplicate OnRecvPacket events
+    criteria = "message.action=/ibc.core.channel.v1.MsgRecvPacket"
+    tx = cli.tx_search(criteria)["txs"][0]
+    events = tx["logs"][1]["events"]
+    for event in events:
+        dup = find_duplicate(event["attributes"])
+        assert not dup, f"duplicate {dup} in {event['type']}"
+
 
 def test_ibc_incentivized_transfer(ibc):
     if not ibc.incentivized:
diff --git a/x/cronos/keeper/gravity_hooks.go b/x/cronos/keeper/gravity_hooks.go
index fc2771568c..2bbeb8dfd6 100644
--- a/x/cronos/keeper/gravity_hooks.go
+++ b/x/cronos/keeper/gravity_hooks.go
@@ -44,7 +44,6 @@ func (k Keeper) AfterSendToCosmosEvent(ctx sdk.Context, event gravitytypes.SendT
 	err := k.doAfterSendToCosmosEvent(cacheCtx, event)
 	if err == nil {
 		commit()
-		ctx.EventManager().EmitEvents(cacheCtx.EventManager().Events())
 	} else {
 		k.Logger(ctx).Error("AfterSendToCosmosEvent hook failed", "error", err)
 	}
diff --git a/x/cronos/keeper/keeper.go b/x/cronos/keeper/keeper.go
index b601463b36..46a14ab026 100644
--- a/x/cronos/keeper/keeper.go
+++ b/x/cronos/keeper/keeper.go
@@ -197,7 +197,6 @@ func (k Keeper) OnRecvVouchers(
 	err := k.ConvertVouchersToEvmCoins(cacheCtx, receiver, tokens)
 	if err == nil {
 		commit()
-		ctx.EventManager().EmitEvents(cacheCtx.EventManager().Events())
 	} else {
 		k.Logger(ctx).Error(
 			fmt.Sprintf("Failed to convert vouchers to evm tokens for receiver %s, coins %s. Receive error %s",