diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e41053d..5016e13 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -41,7 +41,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: ['3.10', '3.11']
     steps:
     - name: Checkout most recent commit
       uses: actions/checkout@v3
diff --git a/deepdow/layers/misc.py b/deepdow/layers/misc.py
index 5c137bf..3b4cd58 100644
--- a/deepdow/layers/misc.py
+++ b/deepdow/layers/misc.py
@@ -141,7 +141,7 @@ def compute_covariance(m, shrinkage_strategy=None, shrinkage_coef=0.5):
 
         """
         fact = 1.0 / (m.size(1) - 1)
-        m = m - torch.mean(m, dim=1, keepdim=True)  # !!!!!!!!!!! INPLACE
+        m = m - torch.mean(m, dim=1, keepdim=True)
         mt = m.t()
 
         s = fact * m.matmul(mt)  # sample covariance matrix
diff --git a/docs/source/changelog.rst b/docs/source/changelog.rst
index 81e7b91..c82e227 100644
--- a/docs/source/changelog.rst
+++ b/docs/source/changelog.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+Unreleased
+----------
+
+v0.2.2
+------
+
 v0.2.1
 ------
 Added
diff --git a/examples/layers/warp.py b/examples/layers/warp.py
index 4c33940..6d1e77e 100644
--- a/examples/layers/warp.py
+++ b/examples/layers/warp.py
@@ -52,5 +52,5 @@
 
     axs[i, 0].plot(tform.numpy().squeeze(), linewidth=3, color='red')
     axs[i, 1].plot(x_warped.numpy().squeeze(), linewidth=3, color='blue')
-    axs[i, 0].set_title(r'$\bf{}$ tform'.format(tform_name))
-    axs[i, 1].set_title(r'$\bf{}$ warped'.format(tform_name))
+    axs[i, 0].set_title('{} tform'.format(tform_name))
+    axs[i, 1].set_title('{} warped'.format(tform_name))