diff --git a/CHANGELOG.md b/CHANGELOG.md
index f579f04..f8ed6a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## 0.14.0 - 2024-05-##
+## 0.14.0 - 2024-05-21
 - Allow assigning values to indexed sets from a dictionary with the lists of members
   for every index.
 - Add AMPL.get_iis() to return dictionaries with variables and constraints in IIS.
diff --git a/amplpy/__init__.py b/amplpy/__init__.py
index 35c3710..cf95239 100644
--- a/amplpy/__init__.py
+++ b/amplpy/__init__.py
@@ -42,7 +42,7 @@
 except Exception:
     pass
 
-__version__ = "0.14.0b0"
+__version__ = "0.14.0"
 
 
 def _list_aliases():
diff --git a/amplpy/ampl.py b/amplpy/ampl.py
index c81178c..d4f2366 100644
--- a/amplpy/ampl.py
+++ b/amplpy/ampl.py
@@ -919,17 +919,17 @@ def get_iis(self):
                 var_iis, con_iis = ampl.get_iis()
                 print(var_iis, con_iis)
         """
-        df_var = dict(
+        iis_var = dict(
             self.get_data(
                 "{i in 1.._nvars: _var[i].iis != 'non'} (_varname[i], _var[i].iis)"
             ).to_list(skip_index=True)
         )
-        df_con = dict(
+        iis_con = dict(
             self.get_data(
                 "{i in 1.._ncons: _con[i].iis != 'non'} (_conname[i], _con[i].iis)"
             ).to_list(skip_index=True)
         )
-        return df_var, df_con
+        return iis_var, iis_con
 
     def get_solution(self, flat=True, zeros=False):
         """
diff --git a/docs/requirements.txt b/docs/requirements.txt
index c87da0a..247702b 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-amplpy==0.13.3
+amplpy==0.14.0
 ampl-sphinx-theme @ git+https://github.com/ampl/ampl.github.io.git#subdirectory=ampl-sphinx-theme
 sphinx==4.2.0
 myst_parser>=0.17.0
diff --git a/setup.py b/setup.py
index cf26f96..f6d9a19 100644
--- a/setup.py
+++ b/setup.py
@@ -165,7 +165,7 @@ def link_args():
 
 setup(
     name="amplpy",
-    version="0.14.0b0",
+    version="0.14.0",
     description="Python API for AMPL",
     long_description=__doc__,
     long_description_content_type="text/markdown",