diff --git a/.travis.yml b/.travis.yml
index 8cf2f37..bb64323 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,15 @@ language: go
 go_import_path: github.com/Spirals-Team/docker-machine-driver-g5k
 
 env:
+    # Linux
     - GIMME_OS=linux GIMME_ARCH=amd64
+    - GIMME_OS=linux GIMME_ARCH=386
+    # MacOS
     - GIMME_OS=darwin GIMME_ARCH=amd64
+    - GIMME_OS=darwin GIMME_ARCH=386
+    # Windows
     - GIMME_OS=windows GIMME_ARCH=amd64
+    - GIMME_OS=windows GIMME_ARCH=386
 
 install:
     - go get -d -v ./...
@@ -19,9 +25,7 @@ deploy:
     provider: releases
     skip_cleanup: true
     file: "docker-machine-driver-g5k-$GIMME_OS-$GIMME_ARCH"
-
     on:
         tags: true
-    
     api_key:
         secure: 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
diff --git a/README.md b/README.md
index 25bd1a0..6bda0cb 100644
--- a/README.md
+++ b/README.md
@@ -6,15 +6,15 @@ A Docker Machine driver for the Grid5000 testbed infrastructure. It can be used
 ## Requirements
 * [Docker](https://www.docker.com/products/overview#/install_the_platform)
 * [Docker Machine](https://docs.docker.com/machine/install-machine)
-* [Go tools](https://golang.org/doc/install)
+* [Go tools (Only for installation from sources)](https://golang.org/doc/install)
 
 You need a Grid5000 account to use this driver. See [this page](https://www.grid5000.fr/mediawiki/index.php/Grid5000:Get_an_account) to create an account.
 
 ## Installation from GitHub releases
-Binary releases are available for Linux, MacOS and Windows from the [releases page](https://github.com/Spirals-Team/docker-machine-driver-g5k/releases).
+Binary releases for Linux, MacOS and Windows using x86/x86_64 CPU architectures are available in the [releases page](https://github.com/Spirals-Team/docker-machine-driver-g5k/releases).
 You can use the following commands to install or upgrade the driver:
 ```bash
-# download the binary for your OS
+# download the binary for your OS and CPU architecture :
 sudo curl -L -o /usr/local/bin/docker-machine-driver-g5k "<link to release>"
 
 # grant execution rigths to the driver for everyone :
diff --git a/api/utils.go b/api/utils.go
deleted file mode 100644
index da1671f..0000000
--- a/api/utils.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package api
-
-import "fmt"
-
-// ConvertDuration take a string "hh:mm:ss" and convert it in seconds
-func ConvertDuration(t string) (int, error) {
-	var h, m, s int
-
-	if _, err := fmt.Sscanf(t, "%d:%d:%d", &h, &m, &s); err != nil {
-		return 0, err
-	}
-
-	return (h * 3600) + (m * 60) + s, nil
-}
diff --git a/driver/driver.go b/driver/driver.go
index 90846ae..d1e73a4 100644
--- a/driver/driver.go
+++ b/driver/driver.go
@@ -249,16 +249,10 @@ func (d *Driver) PreCreateCheck() (err error) {
 
 	// skip job reservation if an ID is already set
 	if d.G5kJobID == 0 {
-		// convert walltime to seconds
-		seconds, err := api.ConvertDuration(d.G5kWalltime)
-		if err != nil {
-			return err
-		}
-
 		// creating a new job with 1 node
 		jobReq := api.JobRequest{
 			Resources:  fmt.Sprintf("nodes=1,walltime=%s", d.G5kWalltime),
-			Command:    fmt.Sprintf("sleep %v", seconds),
+			Command:    "sleep 365d",
 			Properties: d.G5kResourceProperties,
 			Types:      []string{"deploy"},
 		}