diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9248b5..20c2791 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - [#41](https://github.com/bcliang/gamry-parser/pull/40) Use tox as test runner
 
 ### Added
--
+- [#42](https://github.com/bcliang/gamry-parser/pull/42) Update read_header function to support EFM140 data Files
 
 ## [0.4.4] - 2021-02-28
 
diff --git a/gamry_parser/gamryparser.py b/gamry_parser/gamryparser.py
index 349c712..f7b8cf9 100644
--- a/gamry_parser/gamryparser.py
+++ b/gamry_parser/gamryparser.py
@@ -164,7 +164,7 @@ def read_header(self):
         pos = 0
         with open(self.fname, "r", encoding="utf8", errors="ignore") as f:
             cur_line = f.readline().split("\t")
-            while not re.search(r"(^|Z|VFP)CURVE", cur_line[0]):
+            while not re.search(r"(^|Z|VFP|EFM)CURVE", cur_line[0]):
                 if f.tell() == pos:
                     break