diff --git a/src/DormandPrince.jl b/src/DormandPrince.jl
index 1646237..92056a3 100644
--- a/src/DormandPrince.jl
+++ b/src/DormandPrince.jl
@@ -7,7 +7,8 @@ include("types.jl")
 include("interface.jl")
 include("dp5_impl/mod.jl")
 
-using DormandPrince.DP5Impl: dp5_integrate
+
+using DormandPrince.DP5Impl: core_integrator
 
 # export Interface
 export DP5Solver, integrate
diff --git a/src/dp5_impl/mod.jl b/src/dp5_impl/mod.jl
index cb193b9..1091ff6 100644
--- a/src/dp5_impl/mod.jl
+++ b/src/dp5_impl/mod.jl
@@ -1,13 +1,9 @@
 module DP5Impl
 
 using ..DormandPrince: DormandPrince, DP5Solver, Vars, Consts, Options, Report
-# external imports
 
 include("helpers.jl")
 include("checks.jl")
 include("solver.jl")
 
-export DP5Solver, dp5_integrate
-
-
 end
\ No newline at end of file
diff --git a/src/dp5_impl/solver.jl b/src/dp5_impl/solver.jl
index f84ba33..b70fead 100644
--- a/src/dp5_impl/solver.jl
+++ b/src/dp5_impl/solver.jl
@@ -3,10 +3,10 @@
 #include("checks.jl")
 #include("helpers.jl")
 
-function dp5_integrate(
-   solver,
-   xend
-)
+function  core_integrator(
+   solver::DP5Solver{T},
+   xend::T
+) where {T <: Real}
 
     # check nmax, uround, safety factor, beta, safety_factor
     # just accept solver.options and handle accessing attributes internally
diff --git a/src/interface.jl b/src/interface.jl
index e8e5285..cebbf7f 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -29,7 +29,7 @@ end
 # 2. integrate(solver, times) -> iterator
 # 3. integrate(callback, solver, times) -> vector of states with callback applied
 
-integrate(solver::AbstractDPSolver{T}, time::T) where {T<:Real} = dp5_integrate(solver, time) 
+integrate(solver::AbstractDPSolver{T}, time::T) where {T <: Real} = core_integrator(solver, time)
 integrate(solver::AbstractDPSolver{T}, times::AbstractVector{T}) where {T <: Real} = DP5Iterator(solver, times)
 
 function integrate(callback, solver::AbstractDPSolver{T}, times::AbstractVector{T}; sort_times::Bool = true) where {T <: Real}