diff --git a/go.mod b/go.mod
index a96a5df1..7cbd5be2 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/go-test/deep v1.0.6 // indirect
 	github.com/gorilla/websocket v1.4.2
-	github.com/goshuirc/irc-go v0.0.0-20210223005429-8d38e43fc6ed
+	github.com/goshuirc/irc-go v0.0.0-20210301225436-2c4b83d64847
 	github.com/onsi/ginkgo v1.12.0 // indirect
 	github.com/onsi/gomega v1.9.0 // indirect
 	github.com/oragono/confusables v0.0.0-20201108231250-4ab98ab61fb1
diff --git a/go.sum b/go.sum
index 00278a1f..bc668c8c 100644
--- a/go.sum
+++ b/go.sum
@@ -38,6 +38,8 @@ github.com/goshuirc/irc-go v0.0.0-20210222010959-6e139f6c42e9 h1:A1mSQ0N5Kx8i+ae
 github.com/goshuirc/irc-go v0.0.0-20210222010959-6e139f6c42e9/go.mod h1:q/JhvvKLmif3y9q8MDQM+gRCnjEKnu5ClF298TTXJug=
 github.com/goshuirc/irc-go v0.0.0-20210223005429-8d38e43fc6ed h1:cwwqHrmLafgEucSMC9PmFOA671dc4bEZ5z6FsamnBY8=
 github.com/goshuirc/irc-go v0.0.0-20210223005429-8d38e43fc6ed/go.mod h1:q/JhvvKLmif3y9q8MDQM+gRCnjEKnu5ClF298TTXJug=
+github.com/goshuirc/irc-go v0.0.0-20210301225436-2c4b83d64847 h1:MmsZRpAsMxyw0P5/SFn2L6edhmIXRlolgXvOF+fgEiQ=
+github.com/goshuirc/irc-go v0.0.0-20210301225436-2c4b83d64847/go.mod h1:q/JhvvKLmif3y9q8MDQM+gRCnjEKnu5ClF298TTXJug=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
diff --git a/vendor/github.com/goshuirc/irc-go/ircreader/ircreader.go b/vendor/github.com/goshuirc/irc-go/ircreader/ircreader.go
index 7e019b53..4411fac0 100644
--- a/vendor/github.com/goshuirc/irc-go/ircreader/ircreader.go
+++ b/vendor/github.com/goshuirc/irc-go/ircreader/ircreader.go
@@ -66,8 +66,12 @@ func (cc *IRCReader) ReadLine() ([]byte, error) {
 			return line, nil
 		}
 
-		if cc.start == 0 && len(cc.buf) == cc.maxSize {
-			return nil, ErrReadQ // out of space, can't expand or slide
+		// are we out of space? we can read more if any of these are true:
+		// 1. cc.start != 0, so we can slide the existing data back
+		// 2. cc.end < len(cc.buf), so we can read data into the end of the buffer
+		// 3. len(cc.buf) < cc.maxSize, so we can grow the buffer
+		if cc.start == 0 && cc.end == len(cc.buf) && len(cc.buf) == cc.maxSize {
+			return nil, ErrReadQ
 		}
 
 		if cc.eof {
diff --git a/vendor/modules.txt b/vendor/modules.txt
index fdcb2ba3..9c0e9681 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -21,7 +21,7 @@ github.com/go-sql-driver/mysql
 # github.com/gorilla/websocket v1.4.2
 ## explicit
 github.com/gorilla/websocket
-# github.com/goshuirc/irc-go v0.0.0-20210223005429-8d38e43fc6ed
+# github.com/goshuirc/irc-go v0.0.0-20210301225436-2c4b83d64847
 ## explicit
 github.com/goshuirc/irc-go/ircfmt
 github.com/goshuirc/irc-go/ircmsg