diff --git a/tensorflow_datasets/datasets/qm9/checksums.tsv b/tensorflow_datasets/datasets/qm9/checksums.tsv
index a2a048cb2ca..a19976ec197 100644
--- a/tensorflow_datasets/datasets/qm9/checksums.tsv
+++ b/tensorflow_datasets/datasets/qm9/checksums.tsv
@@ -1,3 +1,3 @@
-https://figshare.com/ndownloader/files/3195395	964	af739d4a0fbe894a56f346ad6045ee1b74c58f8a8c9ef3fbfed920c9ad8b00f9	atomref.txt
-https://springernature.figshare.com/ndownloader/files/3195389	86144227	3a63848ac80691bdb8d41834b575afad345b9300d7a2db0c38adb7f6eaa8360c	dsgdb9nsd.xyz.tar.bz2
-https://springernature.figshare.com/ndownloader/files/3195404	486752	3aa5115d540b356de94791d4a74c3bf1ed91c469ecf52a4f5d7cc0506fe02e24	uncharacterized.txt
+https://ndownloader.figshare.com/files/3195395	964	af739d4a0fbe894a56f346ad6045ee1b74c58f8a8c9ef3fbfed920c9ad8b00f9	atomref.txt
+https://ndownloader.figshare.com/files/3195389	86144227	3a63848ac80691bdb8d41834b575afad345b9300d7a2db0c38adb7f6eaa8360c	dsgdb9nsd.xyz.tar.bz2
+https://ndownloader.figshare.com/files/3195404	486752	3aa5115d540b356de94791d4a74c3bf1ed91c469ecf52a4f5d7cc0506fe02e24	uncharacterized.txt
diff --git a/tensorflow_datasets/datasets/qm9/qm9_dataset_builder.py b/tensorflow_datasets/datasets/qm9/qm9_dataset_builder.py
index bdf5c5be89d..31bd2a7d283 100644
--- a/tensorflow_datasets/datasets/qm9/qm9_dataset_builder.py
+++ b/tensorflow_datasets/datasets/qm9/qm9_dataset_builder.py
@@ -36,11 +36,11 @@
 
 _HOMEPAGE = 'https://doi.org/10.6084/m9.figshare.c.978904.v5'
 
-_ATOMREF_URL = 'https://figshare.com/ndownloader/files/3195395'
+_ATOMREF_URL = 'https://ndownloader.figshare.com/files/3195395'
 _UNCHARACTERIZED_URL = (
-    'https://springernature.figshare.com/ndownloader/files/3195404'
+    'https://ndownloader.figshare.com/files/3195404'
 )
-_MOLECULES_URL = 'https://springernature.figshare.com/ndownloader/files/3195389'
+_MOLECULES_URL = 'https://ndownloader.figshare.com/files/3195389'
 
 _SIZE = 133_885
 _CHARACTERIZED_SIZE = 130_831
@@ -287,6 +287,7 @@ def _split_generators(
         skipfooter=1,
         sep=r'\s+',
         names=['Z', 'zpve', 'U0', 'U', 'H', 'G', 'Cv'],
+        engine='python'
     ).to_dict()
 
     uncharacterized = pd.read_table(
@@ -298,6 +299,7 @@ def _split_generators(
         sep=r'\s+',
         usecols=[0],
         names=['index'],
+        engine='python'
     ).values[:, 0]
 
     molecules_dir = dl_manager.download_and_extract(