diff --git a/go.mod b/go.mod
index 04fa379..2c9e140 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.14
 require (
 	cloud.google.com/go/bigquery v1.5.0
 	github.com/olekukonko/tablewriter v0.0.4
+	github.com/slack-go/slack v0.15.0 // indirect
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
 	google.golang.org/api v0.20.0
 	gopkg.in/yaml.v2 v2.2.8
diff --git a/go.sum b/go.sum
index 3735da6..f4476c6 100644
--- a/go.sum
+++ b/go.sum
@@ -32,11 +32,13 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-test/deep v1.0.4/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -58,6 +60,7 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
@@ -67,6 +70,8 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4
 github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
 github.com/googleapis/gax-go/v2 v2.0.5 h1:sjZBwGj9Jlw33ImPtvFviGYvseOtDM7hkSKB7+Tv3SM=
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
@@ -83,7 +88,10 @@ github.com/olekukonko/tablewriter v0.0.4/go.mod h1:zq6QwlOf5SlnkVbMSr5EoBv3636FW
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/slack-go/slack v0.15.0 h1:LE2lj2y9vqqiOf+qIIy0GvEoxgF1N5yLGZffmEZykt0=
+github.com/slack-go/slack v0.15.0/go.mod h1:hlGi5oXA+Gt+yWTPP0plCdRKmjsDxecdHxYQdlMQKOw=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
diff --git a/lib/notify/slack.go b/lib/notify/slack.go
index c5ead5c..b425a6c 100644
--- a/lib/notify/slack.go
+++ b/lib/notify/slack.go
@@ -2,16 +2,22 @@ package notify
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"os"
+
+	"github.com/slack-go/slack"
 )
 
 // Slack has configurations for notifying to Slack
+// Fields that have `json:"-"` are not included in the payload to Slack
 type Slack struct {
-	URL   string `json:"-"`
-	Title string `json:"title"`
-	Color string `json:"color"`
+	URL             string `json:"-"`
+	Title           string `json:"title"`
+	Color           string `json:"color"`
+	UploadChannelID string `json:"-" yaml:"upload_channel_id"`
 }
 
 type payload struct {
@@ -48,3 +54,17 @@ func (s Slack) Notify(message string) error {
 
 	return nil
 }
+
+func (s Slack) Upload(csvBuffer *bytes.Buffer) error {
+	api := slack.New(os.Getenv("SLACK_BOT_TOKEN"))
+
+	_, err := api.UploadFileV2Context(context.Background(), slack.UploadFileV2Parameters{
+		FileSize: len(csvBuffer.String()),
+		Reader:   csvBuffer,
+		Filename: fmt.Sprintf("%s.csv", s.Title),
+		Title:    s.Title,
+		Channel:  s.UploadChannelID,
+	})
+
+	return err
+}
diff --git a/lib/runner/runner.go b/lib/runner/runner.go
index 88642ca..6d8eaf5 100644
--- a/lib/runner/runner.go
+++ b/lib/runner/runner.go
@@ -2,6 +2,7 @@ package runner
 
 import (
 	"bytes"
+	"encoding/csv"
 	"os"
 
 	"github.com/aktsk/bqnotify/lib/bq"
@@ -47,19 +48,50 @@ func run(project string, query config.Query) error {
 		return nil
 	}
 
-	var buf bytes.Buffer
-	table := tablewriter.NewWriter(&buf)
+	// Human-readable table
+	query.Slack.URL = os.Getenv("SLACK_WEBHOOK_URL")
+	if query.Slack.URL != "" {
+		var buf bytes.Buffer
+		table := tablewriter.NewWriter(&buf)
+
+		table.SetHeader(headers)
+
+		for _, v := range rows {
+			table.Append(v)
+		}
 
-	table.SetHeader(headers)
+		table.Render()
 
-	for _, v := range rows {
-		table.Append(v)
+		err = query.Slack.Notify("```\n" + buf.String() + "```")
+		if err != nil {
+			return err
+		}
 	}
 
-	table.Render()
+	// CSV upload
+	if query.Slack.UploadChannelID != "" {
+		var csvBuffer bytes.Buffer
+		writer := csv.NewWriter(&csvBuffer)
 
-	query.Slack.URL = os.Getenv("SLACK_WEBHOOK_URL")
-	query.Slack.Notify("```\n" + buf.String() + "```")
+		err = writer.Write(headers)
+		if err != nil {
+			return err
+		}
+
+		for _, v := range rows {
+			if err := writer.Write(v); err != nil {
+				return err
+			}
+		}
+
+		writer.Flush()
+
+		if err := writer.Error(); err != nil {
+			return nil
+		}
+
+		return query.Slack.Upload(&csvBuffer)
+	}
 
 	return nil
 }