diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 00000000..296d6545
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1 @@
+numpy
\ No newline at end of file
diff --git a/gprMax/gprMax.py b/gprMax/gprMax.py
index 915ce27f..58876f8a 100644
--- a/gprMax/gprMax.py
+++ b/gprMax/gprMax.py
@@ -31,20 +31,20 @@ from enum import Enum
 
 import numpy as np
 
-from gprMax.constants import e0
-from gprMax.exceptions import CmdInputError
-from gprMax.fields_output import prepare_output_file, write_output
-from gprMax.fields_update import *
-from gprMax.grid import FDTDGrid
-from gprMax.input_cmds_geometry import process_geometrycmds
-from gprMax.input_cmds_file import python_code_blocks, write_python_processed, check_cmd_names
-from gprMax.input_cmds_multiuse import process_multicmds
-from gprMax.input_cmds_singleuse import process_singlecmds
-from gprMax.materials import Material
-from gprMax.pml_call_updates import update_pml_electric, update_pml_magnetic
-from gprMax.pml import build_pml, calculate_initial_pml_params
-from gprMax.utilities import update_progress, logo, human_size
-from gprMax.yee_cell_build import build_ex_component, build_ey_component, build_ez_component, build_hx_component, build_hy_component, build_hz_component
+from .constants import e0
+from .exceptions import CmdInputError
+from .fields_output import prepare_output_file, write_output
+from .fields_update import *
+from .grid import FDTDGrid
+from .input_cmds_geometry import process_geometrycmds
+from .input_cmds_file import python_code_blocks, write_python_processed, check_cmd_names
+from .input_cmds_multiuse import process_multicmds
+from .input_cmds_singleuse import process_singlecmds
+from .materials import Material
+from .pml_call_updates import update_pml_electric, update_pml_magnetic
+from .pml import build_pml, calculate_initial_pml_params
+from .utilities import update_progress, logo, human_size
+from .yee_cell_build import build_ex_component, build_ey_component, build_ez_component, build_hx_component, build_hy_component, build_hz_component
 
 
 def main():
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index fb6fe166..00000000
--- a/requirements.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-numpy
-cython
-psutil
-pyfiglet
\ No newline at end of file