diff --git a/src/Express.jl b/src/Express.jl
index ffaf8a29..a95ef81a 100644
--- a/src/Express.jl
+++ b/src/Express.jl
@@ -5,7 +5,7 @@ module Express
 include("ConvergenceTestWorkflow/ConvergenceTestWorkflow.jl")
 include("EquationOfStateWorkflow/EquationOfStateWorkflow.jl")
 # include("StaticElasticity/StaticElasticity.jl")
-# include("PhononWorkflow/PhononWorkflow.jl")
+include("PhononWorkflow/PhononWorkflow.jl")
 # include("QuasiHarmonicApproxWorkflow/QuasiHarmonicApproxWorkflow.jl")
 
 end