diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..aac13a3
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,16 @@
+module gopkg.in/retry.v1
+
+require (
+	github.com/juju/errors v0.0.0-20180726005433-812b06ada177 // indirect
+	github.com/juju/loggo v0.0.0-20180524022052-584905176618 // indirect
+	github.com/juju/retry v0.0.0-20160928201858-1998d01ba1c3 // indirect
+	github.com/juju/testing v0.0.0-20180517134105-72703b1e95eb
+	github.com/juju/utils v0.0.0-20180619112806-c746c6e86f4f
+	github.com/juju/version v0.0.0-20180108022336-b64dbd566305 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
+	golang.org/x/crypto v0.0.0-20180723164146-c126467f60eb // indirect
+	golang.org/x/net v0.0.0-20180724234803-3673e40ba225 // indirect
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
+	gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce // indirect
+	gopkg.in/yaml.v2 v2.2.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..d973c1a
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,27 @@
+github.com/juju/errors v0.0.0-20180726005433-812b06ada177 h1:UliPGoJWlIH3IkkFqnPy/xYF/2tkTRTZhMt8/CwGUvw=
+github.com/juju/errors v0.0.0-20180726005433-812b06ada177/go.mod h1:W54LbzXuIE0boCoNJfwqpmkKJ1O4TCTZMetAt6jGk7Q=
+github.com/juju/loggo v0.0.0-20180524022052-584905176618 h1:MK144iBQF9hTSwBW/9eJm034bVoG30IshVm688T2hi8=
+github.com/juju/loggo v0.0.0-20180524022052-584905176618/go.mod h1:vgyd7OREkbtVEN/8IXZe5Ooef3LQePvuBm9UWj6ZL8U=
+github.com/juju/retry v0.0.0-20160928201858-1998d01ba1c3 h1:56R9RckAEUeaptI0yGE8tzNAs3dD6Wf7giI6D51Czx8=
+github.com/juju/retry v0.0.0-20160928201858-1998d01ba1c3/go.mod h1:OohPQGsr4pnxwD5YljhQ+TZnuVRYpa5irjugL1Yuif4=
+github.com/juju/testing v0.0.0-20180517134105-72703b1e95eb h1:oHBF98WnC1lqCv/W7I7gxnLjD6xJieJ8yt/3IrnMthY=
+github.com/juju/testing v0.0.0-20180517134105-72703b1e95eb/go.mod h1:63prj8cnj0tU0S9OHjGJn+b1h0ZghCndfnbQolrYTwA=
+github.com/juju/utils v0.0.0-20180619112806-c746c6e86f4f h1:ig+5pmJmjxPAf8bwQUDpo7Z0E5l6nh1xE8artIt+A/Y=
+github.com/juju/utils v0.0.0-20180619112806-c746c6e86f4f/go.mod h1:6/KLg8Wz/y2KVGWEpkK9vMNGkOnu4k/cqs8Z1fKjTOk=
+github.com/juju/version v0.0.0-20180108022336-b64dbd566305 h1:lQxPJ1URr2fjsKnJRt/BxiIxjLt9IKGvS+0injMHbag=
+github.com/juju/version v0.0.0-20180108022336-b64dbd566305/go.mod h1:kE8gK5X0CImdr7qpSKl3xB2PmpySSmfj7zVbkZFs81U=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+golang.org/x/crypto v0.0.0-20180723164146-c126467f60eb h1:Ah9YqXLj6fEgeKqcmBuLCbAsrF3ScD7dJ/bYM0C6tXI=
+golang.org/x/crypto v0.0.0-20180723164146-c126467f60eb/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225 h1:kNX+jCowfMYzvlSvJu5pQWEmyWFrBXJ3PBy10xKMXK8=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce h1:xcEWjVhvbDy+nHP67nPDDpbYrY+ILlfndk4bRioVHaU=
+gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce/go.mod h1:yeKp02qBN3iKW1OzL3MGk2IdtZzaj7SFntXj72NppTA=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=