diff --git a/go.mod b/go.mod
index f2d51df0..8e7fa2c8 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208
 	golang.org/x/crypto v0.0.0-20210415154028-4f45737414dc
 	golang.org/x/text v0.3.6
-	gopkg.in/yaml.v2 v2.3.0
+	gopkg.in/yaml.v2 v2.4.0
 )
 
 replace github.com/gorilla/websocket => github.com/oragono/websocket v1.4.2-oragono1
diff --git a/go.sum b/go.sum
index 34eec2d6..11916034 100644
--- a/go.sum
+++ b/go.sum
@@ -145,3 +145,5 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
diff --git a/vendor/gopkg.in/yaml.v2/.travis.yml b/vendor/gopkg.in/yaml.v2/.travis.yml
index 055480b9..7348c50c 100644
--- a/vendor/gopkg.in/yaml.v2/.travis.yml
+++ b/vendor/gopkg.in/yaml.v2/.travis.yml
@@ -11,6 +11,7 @@ go:
     - "1.11.x"
     - "1.12.x"
     - "1.13.x"
+    - "1.14.x"
     - "tip"
 
 go_import_path: gopkg.in/yaml.v2
diff --git a/vendor/gopkg.in/yaml.v2/apic.go b/vendor/gopkg.in/yaml.v2/apic.go
index d2c2308f..acf71402 100644
--- a/vendor/gopkg.in/yaml.v2/apic.go
+++ b/vendor/gopkg.in/yaml.v2/apic.go
@@ -79,6 +79,8 @@ func yaml_parser_set_encoding(parser *yaml_parser_t, encoding yaml_encoding_t) {
 	parser.encoding = encoding
 }
 
+var disableLineWrapping = false
+
 // Create a new emitter object.
 func yaml_emitter_initialize(emitter *yaml_emitter_t) {
 	*emitter = yaml_emitter_t{
@@ -86,7 +88,9 @@ func yaml_emitter_initialize(emitter *yaml_emitter_t) {
 		raw_buffer: make([]byte, 0, output_raw_buffer_size),
 		states:     make([]yaml_emitter_state_t, 0, initial_stack_size),
 		events:     make([]yaml_event_t, 0, initial_queue_size),
-		best_width: -1,
+	}
+	if disableLineWrapping {
+		emitter.best_width = -1
 	}
 }
 
diff --git a/vendor/gopkg.in/yaml.v2/go.mod b/vendor/gopkg.in/yaml.v2/go.mod
index 1934e876..2cbb85ae 100644
--- a/vendor/gopkg.in/yaml.v2/go.mod
+++ b/vendor/gopkg.in/yaml.v2/go.mod
@@ -1,5 +1,5 @@
-module "gopkg.in/yaml.v2"
+module gopkg.in/yaml.v2
 
-require (
-	"gopkg.in/check.v1" v0.0.0-20161208181325-20d25e280405
-)
+go 1.15
+
+require gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405
diff --git a/vendor/gopkg.in/yaml.v2/yaml.go b/vendor/gopkg.in/yaml.v2/yaml.go
index 89650e29..30813884 100644
--- a/vendor/gopkg.in/yaml.v2/yaml.go
+++ b/vendor/gopkg.in/yaml.v2/yaml.go
@@ -175,7 +175,7 @@ func unmarshal(in []byte, out interface{}, strict bool) (err error) {
 //                  Zero valued structs will be omitted if all their public
 //                  fields are zero, unless they implement an IsZero
 //                  method (see the IsZeroer interface type), in which
-//                  case the field will be included if that method returns true.
+//                  case the field will be excluded if IsZero returns true.
 //
 //     flow         Marshal using a flow style (useful for structs,
 //                  sequences and maps).
@@ -464,3 +464,15 @@ func isZero(v reflect.Value) bool {
 	}
 	return false
 }
+
+// FutureLineWrap globally disables line wrapping when encoding long strings.
+// This is a temporary and thus deprecated method introduced to faciliate
+// migration towards v3, which offers more control of line lengths on
+// individual encodings, and has a default matching the behavior introduced
+// by this function.
+//
+// The default formatting of v2 was erroneously changed in v2.3.0 and reverted
+// in v2.4.0, at which point this function was introduced to help migration.
+func FutureLineWrap() {
+	disableLineWrapping = true
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 91cdabc4..d00eca2f 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -92,7 +92,7 @@ golang.org/x/text/transform
 golang.org/x/text/unicode/bidi
 golang.org/x/text/unicode/norm
 golang.org/x/text/width
-# gopkg.in/yaml.v2 v2.3.0
+# gopkg.in/yaml.v2 v2.4.0
 ## explicit
 gopkg.in/yaml.v2
 # github.com/gorilla/websocket => github.com/oragono/websocket v1.4.2-oragono1