diff --git a/.github/workflows/test-pip.yml b/.github/workflows/test-pip.yml
index 1426fc23..f3bc979e 100644
--- a/.github/workflows/test-pip.yml
+++ b/.github/workflows/test-pip.yml
@@ -14,8 +14,8 @@ jobs:
             display_name: "2020"
             deps: "numpy==1.19.* scipy==1.5.* matplotlib==3.3.* pandas==1.1.* tables==3.6.* scikit-learn==0.24.* numba==0.53.* llvmlite==0.36.*"
           - python: "3.10"
-            display_name: "2021"
-            deps: "numpy==1.22.* scipy==1.7.* matplotlib==3.5.* pandas==1.3.* tables==3.7.* scikit-learn==1.0.* numba==0.55.* llvmlite==0.38.*"
+            display_name: "2021ish"
+            deps: "numpy==1.22.* scipy==1.7.* matplotlib==3.5.* pandas==1.4.* tables==3.7.* scikit-learn==1.0.* numba==0.55.* llvmlite==0.38.*"
           - python: "3.11"
             display_name: "2022"
             deps: "numpy==1.24.* scipy==1.9.* matplotlib==3.6.* pandas==2.0.* tables==3.8.* scikit-learn==1.1.* numba==0.57.* llvmlite==0.40.*"
@@ -39,7 +39,7 @@ jobs:
           python-version: ${{ matrix.python }}
 
       - name: Install HDF5 library
-        run: sudo apt-get install libhdf5-dev
+        run: sudo apt-get update && sudo apt-get install -y libhdf5-dev
 
       - name: Install python dependencies
         shell: bash
diff --git a/trackpy/plots.py b/trackpy/plots.py
index 685e0aa5..828542d4 100644
--- a/trackpy/plots.py
+++ b/trackpy/plots.py
@@ -6,6 +6,7 @@
 import logging
 
 import numpy as np
+from .utils import pandas_map
 
 try:
     from pims import plot_to_frame, plots_to_frame, normalize
@@ -640,7 +641,7 @@ def subpx_bias(f, pos_columns=None):
             pos_columns = ['x', 'y', 'z']
         else:
             pos_columns = ['x', 'y']
-    axlist = f[pos_columns].applymap(lambda x: x % 1).hist()
+    axlist = pandas_map(f[pos_columns], lambda x: x % 1).hist()
     return axlist
 
 @make_axes
diff --git a/trackpy/utils.py b/trackpy/utils.py
index bbe1525e..e53baef4 100644
--- a/trackpy/utils.py
+++ b/trackpy/utils.py
@@ -24,6 +24,12 @@
     is_pandas_since_023 = True
 
 
+try:
+    is_pandas_since_210 = (LooseVersion(pd.__version__) >=
+                           LooseVersion('2.1.0'))
+except ValueError:  # Probably a development version
+    is_pandas_since_210 = True
+
 try:
     is_pandas_since_220 = (LooseVersion(pd.__version__) >=
                            LooseVersion('2.2.0'))
@@ -308,6 +314,14 @@ def _pandas_concat_post_023(*args, **kwargs):
     pandas_concat = pd.concat
 
 
+def pandas_map(df, func):
+    """Apply func element-wise to a DataFrame (compat for pandas < 2.1)."""
+    if is_pandas_since_210:
+        return df.map(func)
+    else:
+        return df.applymap(func)
+
+
 def guess_pos_columns(f):
     """ Guess the position columns from a given feature DataFrame """
     if 'z' in f: