diff --git a/routes/create_password.go b/routes/create_password.go
index b5b3bd0..d2d8960 100644
--- a/routes/create_password.go
+++ b/routes/create_password.go
@@ -12,8 +12,8 @@ import (
 func CreatePassword(store storage.Store, maxLength int, encoding *base64.Encoding) http.HandlerFunc {
 	return func(res http.ResponseWriter, req *http.Request) {
 		var reqBody struct {
-			Password  string `json:"password"`
-			ExpiresIn string `json:"expires-in"`
+			Password  string        `json:"password"`
+			ExpiresIn time.Duration `json:"expires-in"`
 		}
 		err := json.NewDecoder(req.Body).Decode(&reqBody)
 		if err != nil {
@@ -32,20 +32,14 @@ func CreatePassword(store storage.Store, maxLength int, encoding *base64.Encodin
 			return
 		}
 
-		var expiresIn time.Duration
-		switch reqBody.ExpiresIn {
-		case "1-hour":
-			expiresIn = 1 * time.Hour
-		case "12-hours":
-			expiresIn = 12 * time.Hour
-		case "1-day":
-			expiresIn = 1 * 24 * time.Hour
-		case "1-week":
-			expiresIn = 1 * 7 * 24 * time.Hour
-		case "2-weeks":
-			expiresIn = 1 * 7 * 24 * time.Hour
-		default:
-			http.Error(res, "Bad expires-in", http.StatusBadRequest)
+		expiresIn := reqBody.ExpiresIn * time.Second
+		if expiresIn <= 0 {
+			http.Error(res, "Too short expires-in", http.StatusBadRequest)
+			return
+		}
+
+		if expiresIn > 2*7*24*time.Hour {
+			http.Error(res, "Too long expires-in", http.StatusBadRequest)
 			return
 		}
 
diff --git a/static/index.html b/static/index.html
index 7e410f4..ff74b67 100644
--- a/static/index.html
+++ b/static/index.html
@@ -43,11 +43,11 @@
                     <label>
                         Expires in
                         <select name="expires-in">
-                            <option value="1-hour" selected>1 Hour</option>
-                            <option value="12-hours">12 Hours</option>
-                            <option value="1-day">1 Day</option>
-                            <option value="1-week">1 Week</option>
-                            <option value="2-weeks">2 Weeks</option>
+                            <option value="3600" selected>1 Hour</option>
+                            <option value="43200">12 Hours</option>
+                            <option value="86400">1 Day</option>
+                            <option value="604800">1 Week</option>
+                            <option value="1209600">2 Weeks</option>
                         </select>
                     </label>
 
diff --git a/static/index.js b/static/index.js
index ee21acf..5b4c9ae 100644
--- a/static/index.js
+++ b/static/index.js
@@ -145,7 +145,7 @@ function init() {
         method: "POST",
         body: JSON.stringify({
           password: encrypted.password,
-          "expires-in": data.get("expires-in"),
+          "expires-in": parseInt(data.get("expires-in")),
         }),
       });
       if (!res.ok) {