diff --git a/environment-dev-arm.yml b/environment-dev-arm.yml
index c711fe76..5ba127d3 100755
--- a/environment-dev-arm.yml
+++ b/environment-dev-arm.yml
@@ -8,10 +8,8 @@ dependencies:
   - python>=3.6.4
   - pip
   - numpy>=1.21.0
-  - scipy>=1.11.0
+  - scipy>=1.4.0
   - pytorch>=1.2.0
-  - cpuonly
-  - jax
   - pyfftw
   - pywavelets
   - sympy
@@ -36,7 +34,6 @@ dependencies:
     - pydata-sphinx-theme
     - sphinx-gallery
     - nbsphinx
-    - sphinxemoji
     - image
     - flake8
     - mypy
diff --git a/environment-dev.yml b/environment-dev.yml
index 135319f7..24f38424 100755
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -8,10 +8,8 @@ dependencies:
   - python>=3.6.4
   - pip
   - numpy>=1.21.0
-  - scipy>=1.11.0
+  - scipy>=1.4.0
   - pytorch>=1.2.0
-  - cpuonly
-  - jax
   - pyfftw
   - pywavelets
   - sympy
@@ -37,7 +35,6 @@ dependencies:
     - pydata-sphinx-theme
     - sphinx-gallery
     - nbsphinx
-    - sphinxemoji
     - image
     - flake8
     - mypy
diff --git a/pylops/signalprocessing/__init__.py b/pylops/signalprocessing/__init__.py
index b4f8fd7b..b3fa0881 100755
--- a/pylops/signalprocessing/__init__.py
+++ b/pylops/signalprocessing/__init__.py
@@ -23,7 +23,6 @@
     Shift                           Fractional Shift operator.
     DWT                             One dimensional Wavelet operator.
     DWT2D                           Two dimensional Wavelet operator.
-    DWTND                           N-dimensional Wavelet operator.
     DCT                             Discrete Cosine Transform.
     DTCWT                           Dual-Tree Complex Wavelet Transform.
     Radon2D	                        Two dimensional Radon transform.
@@ -63,7 +62,6 @@
 from .fredholm1 import *
 from .dwt import *
 from .dwt2d import *
-from .dwtnd import *
 from .seislet import *
 from .dct import *
 from .dtcwt import *
@@ -97,7 +95,6 @@
     "Fredholm1",
     "DWT",
     "DWT2D",
-    "DWTND",
     "Seislet",
     "DCT",
     "DTCWT",
diff --git a/pylops/utils/deps.py b/pylops/utils/deps.py
index d0c53409..3497ce86 100644
--- a/pylops/utils/deps.py
+++ b/pylops/utils/deps.py
@@ -1,6 +1,5 @@
 __all__ = [
     "cupy_enabled",
-    "jax_enabled",
     "devito_enabled",
     "dtcwt_enabled",
     "ucurv_enabled",    
@@ -53,34 +52,6 @@ def cupy_import(message: Optional[str] = None) -> str:
     return cupy_message
 
 
-def jax_import(message: Optional[str] = None) -> str:
-    jax_test = (
-        util.find_spec("jax") is not None and int(os.getenv("JAX_PYLOPS", 1)) == 1
-    )
-    if jax_test:
-        try:
-            import_module("jax")  # noqa: F401
-
-            jax_message = None
-        except (ImportError, ModuleNotFoundError) as e:
-            jax_message = (
-                f"Failed to import jax, Falling back to numpy (error: {e}). "
-                "Please ensure your environment is set up correctly "
-                "for more details visit 'https://jax.readthedocs.io/en/latest/installation.html'"
-            )
-            print(UserWarning(jax_message))
-    else:
-        jax_message = (
-            "Jax package not installed or os.getenv('JAX_PYLOPS') == 0. "
-            f"In order to be able to use {message} "
-            "ensure 'os.getenv('JAX_PYLOPS') == 1' and run "
-            "'pip install jax'; "
-            "for more details visit 'https://jax.readthedocs.io/en/latest/installation.html'"
-        )
-
-    return jax_message
-
-
 def devito_import(message: Optional[str] = None) -> str:
     if devito_enabled:
         try:
@@ -240,18 +211,15 @@ def sympy_import(message: Optional[str] = None) -> str:
 
 
 # Set package availability booleans
-# cupy and jax: the package is imported to check everything is working correctly,
-# if not the package is disabled. We do this here as these libraries are used as drop-in
-# replacement for many numpy and scipy routines when cupy/jax arrays are provided.
+# cupy: the package is imported to check everything is working correctly,
+# if not the package is disabled. We do this here as this library is used as drop-in
+# replacement for many numpy and scipy routines when cupy arrays are provided.
 # all other libraries: we simply check if the package is available and postpone its import
 # to check everything is working correctly when a user tries to create an operator that requires
 # such a package
 cupy_enabled: bool = (
     True if (cupy_import() is None and int(os.getenv("CUPY_PYLOPS", 1)) == 1) else False
 )
-jax_enabled: bool = (
-    True if (jax_import() is None and int(os.getenv("JAX_PYLOPS", 1)) == 1) else False
-)
 devito_enabled = util.find_spec("devito") is not None
 dtcwt_enabled = util.find_spec("dtcwt") is not None
 ucurv_enabled = util.find_spec("ucurv") is not None
diff --git a/pyproject.toml b/pyproject.toml
index 01b44d01..5e435cc7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ classifiers = [
 ]
 dependencies = [
     "numpy >= 1.21.0",
-    "scipy >= 1.11.0",
+    "scipy >= 1.4.0",
 ]
 dynamic = ["version"]
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 42477b9a..cd4b5911 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,8 +1,6 @@
 numpy>=1.21.0
-scipy>=1.11.0
---extra-index-url https://download.pytorch.org/whl/cpu
+scipy>=1.4.0
 torch>=1.2.0
-jax
 numba
 pyfftw
 PyWavelets
@@ -20,7 +18,6 @@ docutils<0.18
 Sphinx
 pydata-sphinx-theme
 sphinx-gallery
-sphinxemoji
 numpydoc
 nbsphinx
 image