diff --git a/consensus/istanbul/celo-ibft-spec.md b/consensus/istanbul/celo-ibft-spec.md
index 75b67fcaf4..a5c76a8282 100644
--- a/consensus/istanbul/celo-ibft-spec.md
+++ b/consensus/istanbul/celo-ibft-spec.md
@@ -230,7 +230,7 @@ Returns the timeout for the given round
 Broadcasts the given message to all connected participants. 
 
 `send(<Commit, H, R, V>, sender(m))`\
-Sends the given message to to the sender of another message.
+Sends the given message to the sender of another message.
 
 #### PCRound
 Asserts that all messages in the given prepared certificate share the same round and returns that round.
diff --git a/docs/docs/_developers/dns-discovery-setup.md b/docs/docs/_developers/dns-discovery-setup.md
index 46d73922c5..4d0b8e7bb8 100644
--- a/docs/docs/_developers/dns-discovery-setup.md
+++ b/docs/docs/_developers/dns-discovery-setup.md
@@ -30,7 +30,7 @@ go get -u github.com/celo-org/celo-blockchain/cmd/ethkey
 ### Crawling the v4 DHT
 
 Our first step is to compile a list of all reachable nodes. The DHT crawler in cmd/devp2p
-is a batch process which runs for a set amount of time. You should should schedule this command
+is a batch process which runs for a set amount of time. You should schedule this command
 to run at a regular interval. To create a node list, run
 
 ```shell
diff --git a/miner/block.go b/miner/block.go
index 96e774f1c9..fd0da1a890 100644
--- a/miner/block.go
+++ b/miner/block.go
@@ -158,7 +158,7 @@ func prepareBlock(w *worker) (*blockState, error) {
 				err := w.chain.RecoverRandomnessCache(lastCommitment, b.header.ParentHash)
 				if err != nil {
 					log.Error("Error in recovering randomness cache", "error", err, "number", header.Number.Uint64())
-					return b, errors.New("failed to to recover the randomness cache after miss")
+					return b, errors.New("failed to recover the randomness cache after miss")
 				}
 				lastRandomnessParentHash = rawdb.ReadRandomCommitmentCache(w.db, lastCommitment)
 				if (lastRandomnessParentHash == common.Hash{}) {
diff --git a/signer/core/signed_data.go b/signer/core/signed_data.go
index ad1ab82556..b7c736a76c 100644
--- a/signer/core/signed_data.go
+++ b/signer/core/signed_data.go
@@ -242,7 +242,7 @@ func (api *SignerAPI) EcRecover(ctx context.Context, data hexutil.Bytes, sig hex
 	// addr = ecrecover(hash, signature)
 	//
 	// Note, the signature must conform to the secp256k1 curve R, S and V values, where
-	// the V value must be be 27 or 28 for legacy reasons.
+	// the V value must be 27 or 28 for legacy reasons.
 	//
 	// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_ecRecover
 	if len(sig) != 65 {