diff --git a/constraints_tests.txt b/constraints_tests.txt
index 362d96b589..92920cea3f 100644
--- a/constraints_tests.txt
+++ b/constraints_tests.txt
@@ -5,3 +5,6 @@
 # A gdal bug caused our test suite to fail, but this issue is unlikely to
 # occur with regular use of invest. https://github.com/OSGeo/gdal/issues/8497
 GDAL!=3.6.*,!=3.7.*
+
+# https://github.com/natcap/pygeoprocessing/issues/387
+GDAL<3.8.5
diff --git a/exe/invest.spec b/exe/invest.spec
index d019f413be..ac4ec440bd 100644
--- a/exe/invest.spec
+++ b/exe/invest.spec
@@ -30,6 +30,7 @@ kwargs = {
         'pkg_resources.py2_warn',
         'cmath',
         'charset_normalizer',
+        'scipy.special._cdflib'
     ],
     'datas': [proj_datas],
     'cipher': block_cipher,