diff --git a/HISTORY.md b/HISTORY.md
index 9cd4f2c..f927df2 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,21 @@
+### Version 1.4.0
+
+#### New features
+
+* [feat(Executables)](https://github.com/MODFLOW-USGS/modflow-devtools/commit/3129417dae2de3aece80c8056a2ac50eede56b91): Support collection-style membership test (#131). Committed by wpbonelli on 2023-12-18.
+* [feat](https://github.com/MODFLOW-USGS/modflow-devtools/commit/6728859a984a3080f8fd4f1135de36bc17454098): Add latex and plot style utilities (#132). Committed by wpbonelli on 2024-01-09.
+* [feat(misc)](https://github.com/MODFLOW-USGS/modflow-devtools/commit/a9b801932866a26a996ed3a45f16048b15246472): Parse literals from environment variables (#135). Committed by wpbonelli on 2024-01-21.
+* [feat(ostags)](https://github.com/MODFLOW-USGS/modflow-devtools/commit/0ad10751ea6ce752e59d83e8cd6275906d73fa70): Apple silicon (#139). Committed by wpbonelli on 2024-02-18.
+
+#### Bug fixes
+
+* [fix](https://github.com/MODFLOW-USGS/modflow-devtools/commit/fd215000c6215b0891e78ee621e40abb2a20b28a): Drop plot styles (already in flopy) (#133). Committed by wpbonelli on 2024-01-09.
+
+#### Refactoring
+
+* [refactor](https://github.com/MODFLOW-USGS/modflow-devtools/commit/9356e067ea813aeeeda2582cf7ec174c11d80159): Remove executables module/class (#136). Committed by wpbonelli on 2024-01-25.
+* [refactor(fixtures)](https://github.com/MODFLOW-USGS/modflow-devtools/commit/613ad010ff6fc782f231b7fa21d1cc660732e7be): Support pytest>=8, drop pytest-cases dependency (#137). Committed by wpbonelli on 2024-01-31.
+
 ### Version 1.3.1
 
 #### Refactoring
diff --git a/docs/conf.py b/docs/conf.py
index b13c9f2..127aeb0 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -8,7 +8,7 @@
 
 project = "modflow-devtools"
 author = "MODFLOW Team"
-release = "1.4.0.dev0"
+release = "1.4.0"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/modflow_devtools/__init__.py b/modflow_devtools/__init__.py
index 0399214..80b4f29 100644
--- a/modflow_devtools/__init__.py
+++ b/modflow_devtools/__init__.py
@@ -1,6 +1,6 @@
 __author__ = "Joseph D. Hughes"
-__date__ = "Nov 21, 2023"
-__version__ = "1.4.0.dev0"
+__date__ = "Feb 19, 2024"
+__version__ = "1.4.0"
 __maintainer__ = "Joseph D. Hughes"
 __email__ = "jdhughes@usgs.gov"
 __status__ = "Production"
diff --git a/version.txt b/version.txt
index b58da95..e21e727 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.4.0.dev0
\ No newline at end of file
+1.4.0
\ No newline at end of file