diff --git a/conda/meta.yaml b/conda/meta.yaml
index be1d15c43..424e4d10d 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -24,7 +24,7 @@ requirements:
   run:
     - python >=3.8
     - numpy >=1.21.0,<2.0.0
-    - orange3 >=3.34.0
+    - orange3 >=3.37.0
     - orange-canvas-core >=0.1.28
     - orange-widget-base >=4.19.0
     - scipy >=1.9.0
diff --git a/orangecontrib/spectroscopy/widgets/owpls.py b/orangecontrib/spectroscopy/widgets/owpls.py
index b1d44e61f..e1230bf35 100644
--- a/orangecontrib/spectroscopy/widgets/owpls.py
+++ b/orangecontrib/spectroscopy/widgets/owpls.py
@@ -27,11 +27,14 @@ class Outputs(OWBaseLearner.Outputs):
 
     class Warning(OWBaseLearner.Warning):
         sparse_data = Msg('Sparse input data: default preprocessing is to scale it.')
+        deprecated = Msg('The PLS widget is deprecated and will be removed in the future.\n'
+                         'You can use a PLS widget in the core Orange instead.')
 
     n_components = Setting(2)
     max_iter = Setting(500)
 
     def add_main_layout(self):
+        self.Warning.deprecated()
 
         self.optimization_box = gui.vBox(
             self.controlArea, "Optimization Parameters")
diff --git a/setup.py b/setup.py
index 987f23927..0ebfab92d 100644
--- a/setup.py
+++ b/setup.py
@@ -128,7 +128,7 @@ def include_documentation(local_dir, install_dir):
             'setuptools>=36.3',  # same as for Orange 3.28
             'pip>=9.0',  # same as for Orange 3.28
             'numpy>=1.21.0,<2.0.0',
-            'Orange3>=3.34.0',
+            'Orange3>=3.37.0',
             'orange-canvas-core>=0.1.28',
             'orange-widget-base>=4.19.0',
             'scipy>=1.9.0',
diff --git a/tox.ini b/tox.ini
index 8b19afa1f..8fdd3b48c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,7 @@ setenv =
 deps =
     {env:PYQT_PYPI_NAME:PyQt5}=={env:PYQT_PYPI_VERSION:5.15.*}
     {env:WEBENGINE_PYPI_NAME:PyQtWebEngine}=={env:WEBENGINE_PYPI_VERSION:5.15.*}
-    oldest: orange3==3.34.0
+    oldest: orange3==3.37.0
     oldest: orange-canvas-core==0.1.28
     oldest: orange-widget-base==4.19.0
     oldest: scikit-learn~=1.0.1