diff --git a/niworkflows/data/nipreps.json b/niworkflows/data/nipreps.json
index c30b65810c3..3bdd2857cb4 100644
--- a/niworkflows/data/nipreps.json
+++ b/niworkflows/data/nipreps.json
@@ -87,7 +87,7 @@
     },
     {
       "name": "datatype",
-      "pattern": "[/\\\\]+(func|anat|fmap|dwi|meg|eeg|perf|figures)[/\\\\]+"
+      "pattern": "[/\\\\]+(func|anat|pet|fmap|dwi|perf|meg|eeg|figures)[/\\\\]+"
     },
     {
       "name": "extension",
@@ -177,12 +177,13 @@
     "sub-{subject}[/ses-{session}]/{datatype<perf>|perf}/sub-{subject}[_ses-{session}][_task-{task}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_dir-{direction}][_run-{run}][_space-{space}][_atlas-{atlas}][_cohort-{cohort}][_desc-{desc}]_{suffix<timeseries>}{extension<.json|.tsv>|.tsv}",
     "sub-{subject}[/ses-{session}]/{datatype<perf>|perf}/sub-{subject}[_ses-{session}][_task-{task}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_dir-{direction}][_run-{run}][_space-{space}][_atlas-{atlas}][_cohort-{cohort}][_desc-{desc}]_{suffix<asl|aslref|att|cbf|coverage|mask>}{extension<.nii|.nii.gz|.json|.tsv>|.tsv}",
     "sub-{subject}[/ses-{session}]/{datatype<fmap>|fmap}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_dir-{direction}][_run-{run}][_part-{part}][_space-{space}][_cohort-{cohort}][_res-{resolution}][_fmapid-{fmapid}][_desc-{desc}]_{suffix<fieldmap>}{extension<.nii|.nii.gz|.json>|.nii.gz}",
-    "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_res-{resolution}][_desc-{desc}]_{suffix<pet>}{extension<.nii|.nii.gz|.json>|.nii.gz}",
+    "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_res-{resolution}][_desc-{desc}]_{suffix<pet|petref>}{extension<.nii|.nii.gz|.json>|.nii.gz}",
     "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_hemi-{hemi<L|R>}]_from-{from}_to-{to}_mode-{mode<image|points>|image}_{suffix<xfm>|xfm}{extension<.txt|.h5>}",
     "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}]_hemi-{hemi<L|R>}[_space-{space}][_cohort-{cohort}][_den-{density}][_desc-{desc}]_{suffix<white|smoothwm|pial|midthickness|inflated|vinflated|sphere|flat|sulc|curv|thickness>}{extension<.surf.gii|.shape.gii>}",
     "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_den-{density}][_desc-{desc}]_{suffix<sulc|curv|thickness>}{extension<.dscalar.nii|.json>}",
     "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_res-{resolution}]_desc-{desc}_{suffix<mask>|mask}{extension<.nii|.nii.gz|.json>|.nii.gz}",
     "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_res-{resolution}]_label-{label}[_desc-{desc}]_{suffix<probseg>|probseg}{extension<.nii|.nii.gz|.json>|.nii.gz}",
+    "sub-{subject}[/ses-{session}]/{datatype<pet>|pet}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_dir-{direction}][_run-{run}][_part-{part}][_space-{space}][_cohort-{cohort}][_desc-{desc}]_{suffix<timeseries|regressors>|timeseries}{extension<.json|.tsv>|.tsv}",
     "sub-{subject}/{datatype<figures>}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_desc-{desc}]_{suffix<T1w|T2w|T1rho|T1map|T2map|T2star|FLAIR|FLASH|PDmap|PD|PDT2|inplaneT[12]|angio|dseg|mask|T2starw|MTw|TSE>}{extension<.html|.svg>|.svg}",
     "sub-{subject}/{datatype<figures>}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_run-{run}][_space-{space}][_cohort-{cohort}][_fmapid-{fmapid}][_desc-{desc}]_{suffix<fieldmap>}{extension<.html|.svg>|.svg}",
     "sub-{subject}/{datatype<figures>}/sub-{subject}[_ses-{session}][_acq-{acquisition}][_ce-{ceagent}][_rec-{reconstruction}][_dir-{direction}][_run-{run}][_echo-{echo}][_part-{part}][_space-{space}][_cohort-{cohort}][_desc-{desc}]_{suffix<dwi|epi|epiref>}{extension<.html|.svg>|.svg}",