diff --git a/.gitignore b/.gitignore
index f78340e..6359fd3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ Manifest.toml
 *.vtr
 *.vts
 *.pvd
+.CondaPkg/
diff --git a/CondaPkg.toml b/CondaPkg.toml
new file mode 100644
index 0000000..e96a042
--- /dev/null
+++ b/CondaPkg.toml
@@ -0,0 +1,3 @@
+[deps]
+vtk = ""
+numpy = ""
diff --git a/Project.toml b/Project.toml
index c744a0d..431afb8 100644
--- a/Project.toml
+++ b/Project.toml
@@ -4,17 +4,21 @@ authors = ["mohamed82008 <mohamed82008@gmail.com>"]
 version = "0.1.0"
 
 [deps]
+CondaPkg = "992eb4ea-22a4-4c89-a5bb-47a3300528ab"
 IterTools = "c8e1da08-722c-5040-9ed9-7db0dc04731e"
 LightXML = "9c8b4983-aa76-5018-a973-4c85ecc9e179"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 PyCall = "438e738f-606a-5dbb-bf0a-cddfbfd45ab0"
+PythonCall = "6099a3de-0909-46bc-b1f4-468b9a2dfc0d"
 VTKDataTypes = "10d27dd1-1d0f-5a4c-b178-bd2d0045a217"
 WriteVTK = "64499a7a-5c06-52f2-abe2-ccb03c286192"
 
 [compat]
+CondaPkg = "0.2"
 IterTools = "1"
 LightXML = "0.9"
 PyCall = "1.92"
+PythonCall = "0.9"
 VTKDataTypes = "0.1"
 WriteVTK = "1.11"
 julia = "1"
diff --git a/src/PyVTK.jl b/src/PyVTK.jl
index 3fdc4b0..a521373 100644
--- a/src/PyVTK.jl
+++ b/src/PyVTK.jl
@@ -1,4 +1,4 @@
-VTKClasses = Dict(
+const VTKClasses = Dict(
     0=>vtk.vtkEmptyCell,
     1=>vtk.vtkVertex, 
     2=>vtk.vtkPolyVertex,
@@ -302,7 +302,7 @@ function PyVTK(dataset::VTKUniformRectilinearData)
     return grid
 end
 
-function add_structured_data_to_grid!(grid::PyObject, dataset::AbstractVTKStructuredData)
+function add_structured_data_to_grid!(grid, dataset::AbstractVTKStructuredData)
     for m in keys(dataset.point_data)
         _var_dim = var_dim(dataset, m, "Point")
         if _var_dim == 1
@@ -337,7 +337,7 @@ function PyVTK(dataset::VTKMultiblockData)
     return mb
 end
 
-function _VTKDataTypes(pyvtk::PyObject)
+function _VTKDataTypes(pyvtk)
     if pyvtk.GetClassName() == "vtkMultiBlockDataSet"
         return extract_blocked_data(pyvtk)
     else
@@ -345,7 +345,7 @@ function _VTKDataTypes(pyvtk::PyObject)
     end
 end
 
-function write_vtk(pyvtk::PyObject, filepath_noext::String)
+function write_vtk(pyvtk, filepath_noext::String)
     classname = pyvtk.GetClassName()
     if classname == "vtkUnstructuredGrid"
         writer = vtk.vtkXMLUnstructuredGridWriter()
diff --git a/src/VTKDataIO.jl b/src/VTKDataIO.jl
index 42facb2..7cdc490 100644
--- a/src/VTKDataIO.jl
+++ b/src/VTKDataIO.jl
@@ -1,31 +1,32 @@
 module VTKDataIO
 
-__precompile__(false)
+# __precompile__(false)
 
 using VTKDataTypes
 using WriteVTK
-using PyCall
+using PythonCall
 using LightXML
 using IterTools
 using Printf
 
-if get(ENV, "JULIA_REGISTRYCI_AUTOMERGE", "false") == "false"
-    @eval begin
-        const vtkns = pyimport_conda("vtk.util.numpy_support", "vtk")
-        const vtk = pyimport_conda("vtk", "vtk")
-        const np = pyimport_conda("numpy", "numpy")
+const vtk = PythonCall.pynew() # initially NULL
+const vtkns = PythonCall.pynew() # initially NULL
+const np = PythonCall.pynew() # initially NULL
+function __init__()
+  PythonCall.pycopy!(vtk, pyimport("vtk"))
+  PythonCall.pycopy!(vtkns, pyimport("vtk.util.numpy_support"))
+  PythonCall.pycopy!(np, pyimport("numpy"))
+end
 
-        include("vtkreaders.jl")
-        include("vtkwriters.jl")
-        include("vtpwriter.jl")
-        include("stlIO.jl")
-        include("extra_readers.jl")
-        include("PyVTK.jl")
-        include("visualize.jl")
+include("vtkreaders.jl")
+include("vtkwriters.jl")
+include("vtpwriter.jl")
+include("stlIO.jl")
+include("extra_readers.jl")
+include("PyVTK.jl")
+include("visualize.jl")
 
-        export read_vtk, write_vtk, read_stl, write_stl, valid_to_write, PyVTK, 
-            _VTKDataTypes, visualize, write_x3d, write_ply, read_obj, read_ply, visualize_3ds
-    end
-end
+export read_vtk, write_vtk, read_stl, write_stl, valid_to_write, PyVTK, 
+_VTKDataTypes, visualize, write_x3d, write_ply, read_obj, read_ply, visualize_3ds
 
 end
diff --git a/src/stlIO.jl b/src/stlIO.jl
index 88fe5f2..c65bfbb 100644
--- a/src/stlIO.jl
+++ b/src/stlIO.jl
@@ -4,7 +4,7 @@ function write_stl(dataset::AbstractStaticVTKData, filepath_no_ext::String)
     return write_stl(polydata, filepath_no_ext)
 end
 
-function write_stl(polydata::PyCall.PyObject, filepath_no_ext::String)
+function write_stl(polydata, filepath_no_ext::String)
     writer = vtk.vtkSTLWriter()
     writer.SetFileName(string(filepath_no_ext, ".stl"))
     writer.SetInputData(polydata)
diff --git a/src/vtkreaders.jl b/src/vtkreaders.jl
index 72ee893..668c76d 100644
--- a/src/vtkreaders.jl
+++ b/src/vtkreaders.jl
@@ -3,10 +3,10 @@ vtk_to_julia(x::Vector, T) = convert.(T, x)
 vtk_to_julia(x::Matrix, T) = convert.(T, copy(x'))
 
 function julia_to_vtk(x::Matrix, args...)
-    return @pycall vtkns.numpy_to_vtk(PyReverseDims(x), args...)::PyObject
+    return vtkns.numpy_to_vtk(PyReverseDims(x), args...)
 end
 function julia_to_vtk(x::Vector, args...)
-    return @pycall vtkns.numpy_to_vtk(np.array(x), args...)::PyObject
+    return vtkns.numpy_to_vtk(np.array(x), args...)
 end
 
 function pytype_as_string(x)
@@ -18,7 +18,7 @@ function pytype_as_string(x)
     end
 end
 
-function read_vtk(reader::PyCall.PyObject)
+function read_vtk(reader)
     if in(reader.GetFileName(), readdir())
         reader.Update()
     else
diff --git a/src/vtpwriter.jl b/src/vtpwriter.jl
index b75c213..517e51c 100644
--- a/src/vtpwriter.jl
+++ b/src/vtpwriter.jl
@@ -3,7 +3,7 @@ function write_vtp(dataset::VTKPolyData, filepath_no_ext::String)
     return write_vtp(polydata, filepath_no_ext)
 end
 
-function write_vtp(polydata::PyObject, filepath_no_ext::String)
+function write_vtp(polydata, filepath_no_ext::String)
     writer = vtk.vtkXMLPolyDataWriter()
     writer.SetFileName(string(filepath_no_ext, ".vtp"))
     writer.SetDataModeToBinary()