diff --git a/.test-conda-env-py3-macos.yml b/.test-conda-env-py3-macos.yml
index 6a41e88bdae78a8656bf4aa87788d01317c72331..f85cff2a4fc49795184c605b3bc1cabbfeaf055b 100644
--- a/.test-conda-env-py3-macos.yml
+++ b/.test-conda-env-py3-macos.yml
@@ -11,8 +11,8 @@ dependencies:
 - islpy
 - pyopencl
 - python=3.6
-- symengine=0.3.0
-- python-symengine=0.3.0
+- symengine=0.4.0
+- python-symengine=0.4.0
 - pyfmmlib
 # for OpenMP support in pyfmmlib
 - libgfortran>=3.0.1
diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index 2ac856756e0df70b068c71d725c8999f0eaf3b03..3cb606c558382c6e4fd66ba6e4a4572bca47133a 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -11,8 +11,8 @@ dependencies:
 - islpy
 - pyopencl
 - python=3.6
-- symengine=0.3.0
-- python-symengine=0.3.0
+- symengine=0.4.0
+- python-symengine=0.4.0
 - pyfmmlib
 - cython
 # things not in here: loopy boxtree pymbolic meshmode sumpy