diff --git a/go.mod b/go.mod
index 676b4f8..84204ab 100644
--- a/go.mod
+++ b/go.mod
@@ -11,12 +11,12 @@ require (
 	github.com/jung-kurt/gofpdf v1.16.2 // indirect
 	github.com/klauspost/compress v1.10.0 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
-	github.com/panjf2000/gnet v1.1.0
+	github.com/panjf2000/gnet v1.1.5
 	github.com/tidwall/evio v1.0.7
 	github.com/valyala/fasthttp v1.9.0
 	golang.org/x/exp v0.0.0-20191129062945-2f5052295587 // indirect
 	golang.org/x/image v0.0.0-20200119044424-58c23975cae1 // indirect
-	golang.org/x/sys v0.0.0-20200331124033-c3d80250170d // indirect
+	golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f // indirect
 	gonum.org/v1/gonum v0.6.1 // indirect
 	gonum.org/v1/netlib v0.0.0-20191031114514-eccb95939662 // indirect
 	gonum.org/v1/plot v0.7.0
diff --git a/go.sum b/go.sum
index 392a71a..ccbdb0a 100644
--- a/go.sum
+++ b/go.sum
@@ -56,8 +56,8 @@ github.com/libp2p/go-reuseport v0.0.1/go.mod h1:jn6RmB1ufnQwl0Q1f+YxAj8isJgDCQza
 github.com/panjf2000/ants/v2 v2.3.1 h1:9iOZHO5XlSO1Gs5K7x06uDFy8bkicWlhOKGh/TufAZg=
 github.com/panjf2000/ants/v2 v2.3.1/go.mod h1:LtwNaBX6OeF5qRtQlaeGndalVwJlS2ueur7uwoAHbPA=
 github.com/panjf2000/gnet v0.0.1-rc.4/go.mod h1:N251s4H0wuPrB0ssD/D4ZQYOFJKZOwYxqIejzAodQqc=
-github.com/panjf2000/gnet v1.1.0 h1:t3F0OotdEtj1KAUnciBdapx3qRshh5HqvBBIOWNLDcY=
-github.com/panjf2000/gnet v1.1.0/go.mod h1:Ux2Nc2pRFNk57YpDhHaZ9jaB4taAiqMBkcAWe/mWxmI=
+github.com/panjf2000/gnet v1.1.5 h1:AX9WCGskfYXmO6/O6zk2Y68a7wxx2OOGZy/NcOzdDcQ=
+github.com/panjf2000/gnet v1.1.5/go.mod h1:o5PiLj4HiorqL/r2shIbwWrhoKf3o4DGFmvy7EJyMH0=
 github.com/phpdave11/gofpdi v1.0.7/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -118,10 +118,10 @@ golang.org/x/sys v0.0.0-20190312061237-fead79001313 h1:pczuHS43Cp2ktBEEmLwScxgjW
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190830142957-1e83adbbebd0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
-golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200331124033-c3d80250170d h1:nc5K6ox/4lTFbMVSL9WRR81ixkcwXThoiF6yf+R9scA=
 golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f h1:gWF768j/LaZugp8dyS4UwsslYCYz9XgFxvlgsn0n9H8=
+golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20180525024113-a5b4c53f6e8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=