diff --git a/requirements.in b/requirements.in
index c8853de9..afed77a7 100644
--- a/requirements.in
+++ b/requirements.in
@@ -37,7 +37,7 @@ Pint >= 0.17
 flufl.lock >= 5.0.3
 psutil >= 5.8.0
 fasteners >= 0.15
-chardet >= 4.0
+chardet < 5.0
 pympler >= 0.9
 stackprinter >= 0.2.5
 line-profiler >= 3.3.0
diff --git a/requirements.txt b/requirements.txt
index 6fa92d8c..c531a2a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ bids-validator==1.9.3
     # via pybids
 certifi==2022.5.18.1
     # via requests
-chardet==5.0.0
+chardet==4.0.0
     # via -r requirements.in
 charset-normalizer==2.0.12
     # via requests