diff --git a/external/external_build.cmake b/external/external_build.cmake
index 8bb063c..ba842be 100644
--- a/external/external_build.cmake
+++ b/external/external_build.cmake
@@ -35,7 +35,7 @@ IF(INTERNAL_HDF5)
 ENDIF(INTERNAL_HDF5)
 
 IF(INTERNAL_NETCDF)
-  SET(NETCDF_URL "https://github.com/Unidata/netcdf-c/archive/v4.7.3.tar.gz" CACHE STRING "URL to download NetCDF from")
+  SET(NETCDF_URL "https://github.com/Unidata/netcdf-c/archive/refs/tags/v4.8.1.tar.gz" CACHE STRING "URL to download NetCDF from")
   SET(NETCDFCXX_URL "https://github.com/Unidata/netcdf-cxx4/archive/v4.3.1.tar.gz" CACHE STRING "URL to download NetCDF-CXX from")
   mark_as_advanced(NETCDF_URL)
 ENDIF(INTERNAL_NETCDF)
@@ -151,7 +151,7 @@ if (INTERNAL_NETCDF)
   SET(EXTRA_NC_FLAGS CPPFLAGS=${CONFIGURE_CPP_FLAGS} LDFLAGS=${CONFIGURE_LD_FLAGS} LIBS=${CONFIGURE_LIBS_FLAGS})
   ExternalProject_Add(netcdf
     DOWNLOAD_DIR ${VIDE_DOWNLOAD_CACHE}
-    URL_HASH SHA1=a78018c377c843cf7b941c2cdad0190920192179
+    URL_HASH SHA256=bc018cc30d5da402622bf76462480664c6668b55eb16ba205a0dfb8647161dd0
     DEPENDS ${hdf5_built}
     PREFIX ${BUILD_PREFIX}/netcdf-prefix
     URL ${NETCDF_URL}
diff --git a/external/external_python_build.cmake b/external/external_python_build.cmake
index 17ef42b..d039851 100644
--- a/external/external_python_build.cmake
+++ b/external/external_python_build.cmake
@@ -1,11 +1,11 @@
 INCLUDE(FindPythonInterp)
 
 SET(INTERNAL_NETCDF4_PYTHON ON)
-SET(INTERNAL_CYTHON ON)
-SET(INTERNAL_HEALPY ON)
-SET(INTERNAL_SETUPTOOLS ON)
-SET(INTERNAL_SCIPY ON)
-SET(INTERNAL_KDTREE_SCIPY ON)
+SET(INTERNAL_CYTHON OFF)
+SET(INTERNAL_HEALPY OFF)
+SET(INTERNAL_SETUPTOOLS OFF)
+SET(INTERNAL_SCIPY OFF)
+SET(INTERNAL_KDTREE_SCIPY OFF)
 
 IF (INTERNAL_SETUPTOOLS)
   execute_process(
@@ -32,12 +32,12 @@ IF(INTERNAL_CYTHON)
 ENDIF(INTERNAL_CYTHON)
 
 IF(INTERNAL_NETCDF4_PYTHON)
-  SET(NETCDF4_PYTHON_URL "https://github.com/Unidata/netcdf4-python/archive/v1.1.9rel.tar.gz" CACHE STRING "URL to download NetCDF4-python from")
+  SET(NETCDF4_PYTHON_URL "https://github.com/Unidata/netcdf4-python/archive/refs/tags/v1.7.1.post1.tar.gz" CACHE STRING "URL to download NetCDF4-python from")
   mark_as_advanced(NETCDF4_PYTHON_URL)
 ENDIF(INTERNAL_NETCDF4_PYTHON)
 
 IF (INTERNAL_HEALPY)
-  SET(HEALPY_URL "http://github.com/healpy/healpy/archive/1.4.1.tar.gz" CACHE STRING "URL to download Healpy from")
+  SET(HEALPY_URL "http://github.com/healpy/healpy/archive/1.17.3.tar.gz" CACHE STRING "URL to download Healpy from")
   mark_as_advanced(HEALPY_URL)
 ENDIF(INTERNAL_HEALPY)
 
@@ -52,7 +52,7 @@ IF(INTERNAL_ARGPARSE)
 ENDIF(INTERNAL_ARGPARSE)
 
 IF(INTERNAL_SCIPY)
-  SET(SCIPY_URL "https://pypi.python.org/packages/2f/12/565c08132db50a0ba34a33e0901f3d1d4d72e3b432ea828e4d87be5a4991/scipy-0.13.3.tar.gz" CACHE STRING "URL to download scipy from")
+  SET(SCIPY_URL "https://github.com/scipy/scipy/archive/refs/tags/v1.15.2.tar.gz" CACHE STRING "URL to download scipy from")
   mark_as_advanced(SCIPY_URL)
 ENDIF(INTERNAL_SCIPY)
 
@@ -127,6 +127,7 @@ IF(INTERNAL_NETCDF4_PYTHON)
   ExternalProject_Add(netcdf4-python
     DEPENDS ${PREV_PYTHON_BUILD} netcdf
     URL ${NETCDF4_PYTHON_URL}
+    URL_HASH SHA256=f42dc67e0b5315f889b50114b888d4b2116197dfa61978d965a50ecd94b75f70
     PREFIX ${BUILD_PREFIX}/netcdf4-python-prefix
     CONFIGURE_COMMAND echo "No configure"
     BUILD_IN_SOURCE 1
@@ -152,6 +153,8 @@ IF(INTERNAL_HEALPY)
   ExternalProject_Add(healpy
     DEPENDS cfitsio ${PREV_PYTHON_BUILD}
     URL ${HEALPY_URL}
+    GIT_REPOSITORY https://github.com/healpy/healpy/
+    GIT_TAG 1.18.0 
     PREFIX ${BUILD_PREFIX}/healpy-prefix
     CONFIGURE_COMMAND echo "No configure"
     BUILD_IN_SOURCE 1
@@ -200,7 +203,7 @@ IF(INTERNAL_SCIPY)
   ExternalProject_Add(scipy
     DEPENDS ${PREV_PYTHON_BUILD}
     URL ${SCIPY_URL}
-    URL_HASH MD5=0547c1f8e8afad4009cc9b5ef17a2d4d
+    URL_HASH SHA256=cd58a314d92838f7e6f755c8a2167ead4f27e1fd5c1251fd54289569ef3495ec
     PREFIX ${BUILD_PREFIX}/scipy-prefix
     CONFIGURE_COMMAND echo "No configure"
     BUILD_IN_SOURCE 1