diff --git a/docs/dapp/opl/celer/ping-example.md b/docs/dapp/opl/celer/ping-example.md
index e2f4d5e09c..ed8d7d44c5 100644
--- a/docs/dapp/opl/celer/ping-example.md
+++ b/docs/dapp/opl/celer/ping-example.md
@@ -171,7 +171,7 @@ You'll need the following three parameters:
 
 - `_dstContract`: The contract address of the reveiving contract on the
   destination chain which you just deployed.
-- `_dstChainId`: The chain id of the the destination chain. Which is in our
+- `_dstChainId`: The chain id of the destination chain. Which is in our
   example `Sapphire Testnet` - `23295`.
 - `message`: The encoded message. e.g. "Hello from BSC" -
   `0x48656c6c6f2066726f6d20425343000000000000000000000000000000000000`.
diff --git a/docs/dapp/opl/opl-sdk/ping-example.md b/docs/dapp/opl/opl-sdk/ping-example.md
index fa327df1ed..67eda476af 100644
--- a/docs/dapp/opl/opl-sdk/ping-example.md
+++ b/docs/dapp/opl/opl-sdk/ping-example.md
@@ -156,7 +156,7 @@ back and forth.
 2. Get next nonce of your account from `BSC Testnet`
    1. If you didn't do anything on *BSC Testnet* yet this will `0`.
    2. Else you need to get your last nonce, e.g. by checking your account
-address on [bscscan](https://testnet.bscscan.com/) and and inspect the details
+address on [bscscan](https://testnet.bscscan.com/) and inspect the details
 of your latest transaction, and then add 1.
 3. In Metamask, switch to the `Sapphire Testnet` network and select
    `Injected Provider - MetaMask` as the environment in Remix.
diff --git a/docs/node/testnet/upgrade-log.md b/docs/node/testnet/upgrade-log.md
index bdbc26bb98..1d75c4f667 100644
--- a/docs/node/testnet/upgrade-log.md
+++ b/docs/node/testnet/upgrade-log.md
@@ -565,7 +565,7 @@ For a more detailed explanation of the parameters below, see the [Genesis Docume
 * **`roothash.params.gas_costs.submit_msg`** is a new parameter that specifies
   the cost for an submit message transaction. It will be set to `1000`.
   This will be done automatically with the `oasis-node debug fix-genesis` command.
-* **`roothash.params.max_in_runtime_messages`** is a new parameter that that
+* **`roothash.params.max_in_runtime_messages`** is a new parameter that
   specifies the maximum number of incoming messages that can be queued for
   processing by a runtime. It will be set to `128`.