diff --git a/Project.toml b/Project.toml
index 436ad8370..710426c03 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Boscia"
 uuid = "36b166db-dac5-4d05-b36a-e6c4cef071c9"
 authors = ["ZIB IOL"]
-version = "0.1.26"
+version = "0.1.27"
 
 [deps]
 Bonobo = "f7b14807-3d4d-461a-888a-05dd4bca8bc3"
@@ -28,7 +28,7 @@ Bonobo = "0.1.3"
 DataStructures = "0.18"
 Dates = "1.6"
 Distributions = "0.25"
-FrankWolfe = "0.2.24, 0.3"
+FrankWolfe = "0.4"
 HiGHS = "1"
 LinearAlgebra = "1.6"
 MathOptInterface = "1"
diff --git a/src/callbacks.jl b/src/callbacks.jl
index a61c0a9d7..a1968d028 100644
--- a/src/callbacks.jl
+++ b/src/callbacks.jl
@@ -21,7 +21,7 @@ function build_FW_callback(
                 check_infeasible_vertex(tree.root.problem.tlmo.blmo, tree)
                 @assert is_linear_feasible(tree.root.problem.tlmo, state.v)
             end  
-            if state.tt != FrankWolfe.simplex_descent && !is_integer_feasible(tree, state.v)
+            if state.step_type != FrankWolfe.ST_SIMPLEXDESCENT && !is_integer_feasible(tree, state.v)
                 @info "Vertex not integer feasible! Here are the integer variables: $(state.v[tree.root.problem.integer_variables])"
                 @assert is_integer_feasible(tree, state.v)
             end    
@@ -51,7 +51,7 @@ function build_FW_callback(
             return false
         end
 
-        if tree.root.options[:domain_oracle](state.v) && state.tt != FrankWolfe.simplex_descent
+        if tree.root.options[:domain_oracle](state.v) && state.step_type != FrankWolfe.ST_SIMPLEXDESCENT
             val = tree.root.problem.f(state.v)
             if val < tree.incumbent
                 #TODO: update solution without adding node