diff --git a/src/interface.jl b/src/interface.jl
index ff2b87e..5b4e88e 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -55,7 +55,7 @@ function runMCTS(
   maxDepth::Integer=3, 
   maxiterations::Integer=10, 
   explorationweight::Number=1.0,
-  ) where {T1<:AbstractDict}
+  )
   
   root = MCTSNode("root", initialState, 0, 0, 0, 0, false, nothing, Dict{String, MCTSNode}())
 
diff --git a/src/mcts.jl b/src/mcts.jl
index cc69585..5eff50b 100644
--- a/src/mcts.jl
+++ b/src/mcts.jl
@@ -288,7 +288,7 @@ julia>
 """
 function simulate(node::MCTSNode, transition::Function, args...; 
   maxDepth::Integer=3, totalsample::Integer=3
-  )::Union{Tuple{Number, Dict{Symbol, <:Any}}, Tuple{Number, Nothing}} where {T<:AbstractDict}
+  )::Union{Tuple{Number, Dict{Symbol, <:Any}}, Tuple{Number, Nothing}}
 
   simTrajectoryReward = 0.0
   terminalstate = nothing