diff --git a/src/exoscale/tools/project/api/version.clj b/src/exoscale/tools/project/api/version.clj
index fee966c..8b4a30f 100644
--- a/src/exoscale/tools/project/api/version.clj
+++ b/src/exoscale/tools/project/api/version.clj
@@ -5,10 +5,15 @@
             [clojure.tools.deps.alpha.util.dir :as td]
             [exoscale.deps-version :as version]))
 
+(defn run-version-fn [version-fn]
+  (when-let [f (requiring-resolve version-fn)]
+    (f)))
+
 (defn get-version
-  [{:as _opts :exoscale.project/keys [version-file version]}]
+  [{:as _opts :exoscale.project/keys [version-file version-fn version]}]
   (or version
-      (some-> version-file version/read-version-file*)))
+      (some-> version-file version/read-version-file*)
+      (qualified-ident? version-fn) (run-version-fn version-fn)))
 
 (defn remove-snapshot
   [{:as _opts
diff --git a/src/exoscale/tools/project/standalone.clj b/src/exoscale/tools/project/standalone.clj
index cabd70c..83e2461 100644
--- a/src/exoscale/tools/project/standalone.clj
+++ b/src/exoscale/tools/project/standalone.clj
@@ -60,7 +60,6 @@
 
 (defn assoc-version
   [{:as opts :exoscale.project/keys [version-file]}]
-
   (let [v (version/read-version-file* version-file)]
     (cond-> opts
       (some? v)