diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 011d87f..82d20ef 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,10 @@
 Change Log
 ==========
 
+[1.4.1] - 2024-08-04
+--------------------
+- [ADDED] Numpy 2 compatibility
+
 [1.4.0] - 2024-03-29
 --------------------
 - [ADDED] Official support for Python 3.12.
diff --git a/CITATION.cff b/CITATION.cff
index 69d79cf..8750fcb 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -5,7 +5,7 @@ authors:
     given-names: Felix M.
     orcid: https://orcid.org/0000-0003-0596-9585
 title: "SuSi: SUpervised Self-organIzing maps in Python"
-version: 1.4.0
+version: 1.4.1
 doi: "10.5281/zenodo.2609130"
 date-released: 2021-12-11
 repository-code: https://github.com/felixriese/susi
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 4c66554..b69354a 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -2,5 +2,5 @@
 -r docs/requirements.txt
 -r test-requirements.txt
 
-mypy==1.9.0
-pre-commit==3.6.2
+mypy==1.11.1
+pre-commit==3.8.0
diff --git a/docs/conf.py b/docs/conf.py
index 18a8051..bb89184 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -27,7 +27,7 @@
 # The short X.Y version
 version = ""
 # The full version, including alpha/beta/rc tags
-release = "1.4.0"
+release = "1.4.1"
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/guide/package.json b/guide/package.json
index 3e9810b..3397d47 100755
--- a/guide/package.json
+++ b/guide/package.json
@@ -1,6 +1,6 @@
 {
   "name": "susi-self-organizing-maps-with-python",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "Susi is a Python package for unsupervised, supervised and semi-supervised self-organizing maps (SOM).",
   "main": "index.js",
   "authors": {
diff --git a/meta.yaml b/meta.yaml
index e2107f3..5abf79c 100644
--- a/meta.yaml
+++ b/meta.yaml
@@ -1,5 +1,5 @@
 {% set name = "susi" %}
-{% set version = "1.4.0" %}
+{% set version = "1.4.1" %}
 
 
 package:
diff --git a/requirements.txt b/requirements.txt
index 635d551..da04e5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ numpy>=1.18.5
 scikit-learn>=0.21.1
 scipy>=1.3.1
 tqdm>=4.45.0
-matplotlib==3.7.2
+matplotlib>=3.9.0
 
 # for the examples
 notebook>=6.0.0
diff --git a/setup.py b/setup.py
index 9c5dec8..61ce1a8 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 
 setuptools.setup(
     name="susi",
-    version="1.4.0",
+    version="1.4.1",
     author="Felix M. Riese",
     author_email="github@felixriese.de",
     description=(
diff --git a/susi/SOMClassifier.py b/susi/SOMClassifier.py
index 503fe21..bab4165 100644
--- a/susi/SOMClassifier.py
+++ b/susi/SOMClassifier.py
@@ -276,7 +276,7 @@ def _set_placeholder(self) -> None:
             self.placeholder_ = self.placeholder_dict_["str"]
         elif self.class_dtype_ in [int, np.uint8, np.int64]:
             self.placeholder_ = self.placeholder_dict_["int"]
-        elif self.class_dtype_ in [float, np.float_, np.float64]:
+        elif self.class_dtype_ in [float, np.float64]:
             self.placeholder_ = self.placeholder_dict_["float"]
         else:
             raise ValueError(
diff --git a/susi/SOMPlots.py b/susi/SOMPlots.py
index a6022f8..d93f9e7 100644
--- a/susi/SOMPlots.py
+++ b/susi/SOMPlots.py
@@ -122,10 +122,7 @@ def plot_som_histogram(
 
     ax.set_xlabel("SOM columns", fontsize=fontsize)
     ax.set_ylabel("SOM rows", fontsize=fontsize)
-    for tick in ax.xaxis.get_major_ticks():
-        tick.label.set_fontsize(fontsize)
-    for tick in ax.yaxis.get_major_ticks():
-        tick.label.set_fontsize(fontsize)
+    ax.tick_params(labelsize=fontsize)
 
     # to be compatible with plt.imshow:
     ax.invert_yaxis()
@@ -172,10 +169,7 @@ def plot_umatrix(
     ax.set_yticklabels(np.arange(0, n_rows + 1, 10))
 
     # ticks and labels
-    for tick in ax.xaxis.get_major_ticks():
-        tick.label.set_fontsize(fontsize)
-    for tick in ax.yaxis.get_major_ticks():
-        tick.label.set_fontsize(fontsize)
+    ax.tick_params(labelsize=fontsize)
     ax.set_ylabel("SOM rows", fontsize=fontsize)
     ax.set_xlabel("SOM columns", fontsize=fontsize)
 
diff --git a/susi/__init__.py b/susi/__init__.py
index 35708a2..3def76d 100644
--- a/susi/__init__.py
+++ b/susi/__init__.py
@@ -5,7 +5,7 @@
 
 """
 
-__version__ = "1.4.0"
+__version__ = "1.4.1"
 
 from .SOMClassifier import SOMClassifier
 from .SOMClustering import SOMClustering
diff --git a/test-requirements.txt b/test-requirements.txt
index cb892ae..88f1bc5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,9 +1,9 @@
-black==24.3.0
+black==24.8.0
 codecov>=2.1.13
-coverage>=7.4.4
-flake8==7.0.0
+coverage>=7.6.0
+flake8==7.1.0
 isort==5.13.2
 nbval>=0.11.0
-pytest>=8.1.1
+pytest>=8.3.2
 pytest-cov>=4.1.0
 pytest_mock==3.14.0