diff --git a/CHANGES b/CHANGES
index 990ae9d8..d6ab9d92 100644
--- a/CHANGES
+++ b/CHANGES
@@ -21,6 +21,9 @@ Changes:
   - alchemlyb adopts SPEC 0 (replaces NEP 29)
     https://scientific-python.org/specs/spec-0000/
 
+Fixes
+  - Support matplotlib 3.9.0 (issue alchemistry/flamel#28, PR#319).
+
 
 21/05/2024 xiki-tempula
 
diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index a8795f1c..bef524b7 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -8,7 +8,7 @@ dependencies:
 - pymbar>=4
 - scipy
 - scikit-learn
-- matplotlib
+- matplotlib>=3.7
 - loguru
 - pyarrow
 
diff --git a/environment.yml b/environment.yml
index 025ff953..95512668 100644
--- a/environment.yml
+++ b/environment.yml
@@ -9,5 +9,5 @@ dependencies:
 - scipy
 - scikit-learn
 - pyarrow
-- matplotlib
+- matplotlib>=3.7
 - loguru
diff --git a/setup.py b/setup.py
index 67df7d72..668a9c3b 100755
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,7 @@
         "pymbar>=4",
         "scipy",
         "scikit-learn",
-        "matplotlib",
+        "matplotlib>=3.7",
         "loguru",
         "pyarrow",
     ],
diff --git a/src/alchemlyb/visualisation/ti_dhdl.py b/src/alchemlyb/visualisation/ti_dhdl.py
index cfdb2238..1cd91728 100644
--- a/src/alchemlyb/visualisation/ti_dhdl.py
+++ b/src/alchemlyb/visualisation/ti_dhdl.py
@@ -222,6 +222,6 @@ def getInd(r=ri, z=[0]):
         color="#151B54",
     )
     lege = ax.legend(prop=FP(size=14), frameon=False, loc=1)
-    for l in lege.legendHandles:
+    for l in lege.legend_handles:
         l.set_linewidth(10)
     return ax