diff --git a/0001-Limit-newVersion-s-re.sub-to-a-single-replacement.patch b/0001-Limit-newVersion-s-re.sub-to-a-single-replacement.patch
new file mode 100644
index 0000000..0efb6a5
--- /dev/null
+++ b/0001-Limit-newVersion-s-re.sub-to-a-single-replacement.patch
@@ -0,0 +1,37 @@
+From ea772dae0d8bb266233c3fd9e2012281a821ef44 Mon Sep 17 00:00:00 2001
+From: Josh Stone <jistone@redhat.com>
+Date: Fri, 2 Nov 2018 16:20:22 -0700
+Subject: [PATCH] Limit newVersion's re.sub to a single replacement
+
+Python 3.7 changed `re.sub` to replace empty matches next to a previous
+non-empty match, which caused `SpecFile.newVersion` to double its
+replacements.  We can use `count=1` to limit this.
+
+ref: https://bugs.python.org/issue32308
+---
+ rpmdev-bumpspec | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/rpmdev-bumpspec b/rpmdev-bumpspec
+index 35e6c9c..06737b5 100755
+--- a/rpmdev-bumpspec
++++ b/rpmdev-bumpspec
+@@ -134,13 +134,13 @@ class SpecFile(object):
+             original = self.lines[i]
+             if self.lines[i].lower().startswith('version:'):
+                 self.lines[i] = re.sub(
+-                    r'[^: \t]*$', v, self.lines[i].rstrip()) + '\n'
++                    r'[^: \t]*$', v, self.lines[i].rstrip(), count=1) + '\n'
+                 changed = changed or self.lines[i] != original
+             elif self.lines[i].lower().startswith('release:'):
+                 # split and reconstruct to preserve whitespace
+                 split = re.split(r':', self.lines[i].rstrip())
+                 self.lines[i] = split[0] + ':' + \
+-                    re.sub(r'[^ \t]*$', r, split[1]) + '\n'
++                    re.sub(r'[^ \t]*$', r, split[1], count=1) + '\n'
+                 changed = changed or self.lines[i] != original
+ 
+         return changed
+-- 
+2.17.2
+
diff --git a/rpmdevtools.spec b/rpmdevtools.spec
index 887c29a..d0453e2 100644
--- a/rpmdevtools.spec
+++ b/rpmdevtools.spec
@@ -8,7 +8,7 @@
 
 Name:           rpmdevtools
 Version:        8.10
-Release:        6%{?dist}
+Release:        7%{?dist}
 Summary:        RPM Development Tools
 
 # rpmdev-setuptree is GPLv2, everything else GPLv2+
@@ -18,6 +18,7 @@ Source0:        https://releases.pagure.org/rpmdevtools/%{name}-%{version}.tar.x
 
 # Backports from upstream
 Patch0001:      0001-bumpspec-checksig-Avoid-python-3.6-regex-related-dep.patch
+Patch0002:      0001-Limit-newVersion-s-re.sub-to-a-single-replacement.patch
 
 BuildArch:      noarch
 # help2man, pod2man, *python for creating man pages
@@ -126,6 +127,9 @@ done
 
 
 %changelog
+* Wed Nov 28 2018 Neal Gompa <ngompa13@gmail.com> - 8.10-7
+- Fix regex substitution issues with Python 3.7 (rhbz#1651954)
+
 * Sun Sep 16 2018 Neal Gompa <ngompa13@gmail.com> - 8.10-6
 - Fix regex related deprecation warnings (rhbz#1598089)