diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d71dde5f..ea3a0ad9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest-large, macos-latest]
-        python: ['3.10', '3.12']
+        python: ['3.10', '3.12', '3.14']
     steps:
       - uses: actions/checkout@v5
       - name: Use Python ${{ matrix.python }}
diff --git a/requirements-full.txt b/requirements-full.txt
index dda5d833..2ecec41f 100644
--- a/requirements-full.txt
+++ b/requirements-full.txt
@@ -1,5 +1,6 @@
 # Main dependencies
-numpy>=1.14.5
+# Note: NumPy support for Python 3.14 is not stable yet. Use Python 3.13 or earlier.
+numpy>=1.14.5; python_version < '3.14'
 tqdm>=4.17.1
 networkx>=2
 more_itertools
diff --git a/requirements.txt b/requirements.txt
index 8a1184c0..e9c2a936 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 # Main dependencies
-numpy>=1.14.5
+# Note: NumPy support for Python 3.14 is not stable yet. Use Python 3.13 or earlier.
+numpy>=1.14.5; python_version < '3.14'
 tqdm>=4.17.1
 networkx>=2
 more_itertools
diff --git a/textworld/envs/pddl/textgen/__init__.py b/textworld/envs/pddl/textgen/__init__.py
index 27826a4d..6d233973 100644
--- a/textworld/envs/pddl/textgen/__init__.py
+++ b/textworld/envs/pddl/textgen/__init__.py
@@ -93,8 +93,7 @@ def __repr__(self):
 
     def derive(self, context=None):
         context = context or self.context
-        locals().update(context["variables"])
-        value = eval(self.expression)
+        value = eval(self.expression, None, context["variables"])
         return [TerminalSymbol(value)]
 
 
diff --git a/textworld/version.py b/textworld/version.py
index 0e1a38d3..48c2f6b0 100644
--- a/textworld/version.py
+++ b/textworld/version.py
@@ -1 +1 @@
-__version__ = '1.7.0'
+__version__ = '1.7.1'