diff --git a/.ci/37.yml b/.ci/310.yml
similarity index 91%
rename from .ci/37.yml
rename to .ci/310.yml
index 1d3a9a49..b05fef3f 100644
--- a/.ci/37.yml
+++ b/.ci/310.yml
@@ -2,7 +2,7 @@ name: test
 channels:
   - conda-forge
 dependencies:
-  - python=3.7
+  - python=3.10
   - deprecation
   - geopandas>=0.9
   - joblib
@@ -22,10 +22,11 @@ dependencies:
   - urbanaccess
   - rvlib
   - numba
+  - pyproj >=3
+
   # testing, etc
   - codecov
   - pytest
   - pytest-mpl
   - pytest-cov
   - twine
-  - jsonschema==3.*
diff --git a/.ci/38.yml b/.ci/38.yml
index ee1040f9..f64d7fdb 100644
--- a/.ci/38.yml
+++ b/.ci/38.yml
@@ -22,11 +22,12 @@ dependencies:
   - urbanaccess
   - rvlib
   - numba
+  - pyproj >=3
+
   # testing, etc
   - codecov
   - pytest
   - pytest-mpl
   - pytest-cov
   - twine
-  - jsonschema==3.*
 
diff --git a/.ci/39.yml b/.ci/39.yml
index 3ae8cde0..e103b1d7 100644
--- a/.ci/39.yml
+++ b/.ci/39.yml
@@ -21,6 +21,8 @@ dependencies:
   - tqdm
   - urbanaccess
   - numba
+  - pyproj >=3
+
   # testing, etc
   - codecov
   - pytest
@@ -28,7 +30,7 @@ dependencies:
   - pytest-cov
   - twine
   - rvlib
-  - jsonschema==3.*
+
   # docs
   - ipywidgets
   - nbsphinx
diff --git a/.github/workflows/unittests.yml b/.github/workflows/unittests.yml
index 03875e1e..26104d18 100644
--- a/.github/workflows/unittests.yml
+++ b/.github/workflows/unittests.yml
@@ -18,7 +18,7 @@
      strategy:
        matrix:
          os: [ubuntu-latest, macos-latest, windows-latest]
-         environment-file: [.ci/37.yml, .ci/38.yml, .ci/39.yml]
+         environment-file: [.ci/38.yml, .ci/39.yml, .ci/310.yml]
          experimental: [false]
          fail-fast: [false]
 
diff --git a/environment.yml b/environment.yml
index 9215268b..b5ec6a51 100644
--- a/environment.yml
+++ b/environment.yml
@@ -22,4 +22,5 @@ dependencies:
   - tqdm
   - urbanaccess
   - rvlib
-  - numba
\ No newline at end of file
+  - numba
+  - pyproj >=3
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 4eff006f..15b27fdd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,3 +15,4 @@ seaborn
 tqdm
 rvlib>=0.0.5
 numba
+pyproj>=3
\ No newline at end of file