diff --git a/hledger-lib/CHANGES.md b/hledger-lib/CHANGES.md
index fd8122f9d..650270d6a 100644
--- a/hledger-lib/CHANGES.md
+++ b/hledger-lib/CHANGES.md
@@ -1,7 +1,12 @@
 Internal/api/developer-ish changes in the hledger-lib (and hledger) packages.
 For user-visible changes, see the hledger package changelog.
 
-# abc53024
+# 1.17.1 2020-03-19
+
+- require newer Decimal, math-functions libs to ensure consistent
+  rounding behaviour, even when built with old GHCs/snapshots. 
+  hledger uses banker's rounding (rounds to nearest even number, eg
+  0.5 with with zero decimal places is "0").
 
 - added: debug helpers traceAt, traceAtWith
 
diff --git a/hledger-ui/CHANGES.md b/hledger-ui/CHANGES.md
index b8ed9d0cc..49d43bfbe 100644
--- a/hledger-ui/CHANGES.md
+++ b/hledger-ui/CHANGES.md
@@ -1,10 +1,19 @@
 User-visible changes in hledger-ui.
 See also the hledger changelog.
 
-# c1488db4
+# 1.17.1.1 2020-03-19
+
+- update bounds after some belated hledger-* version bumps
+
+# 1.17.1 2020-03-19
 
 - ui: fix a regression, empty register of depth-limited account (fix #1208)
 
+- require newer Decimal, math-functions libs to ensure consistent
+  rounding behaviour, even when built with old GHCs/snapshots. 
+  hledger uses banker's rounding (rounds to nearest even number, eg
+  0.5 with with zero decimal places is "0").
+
 # 1.17 2020-03-01
 
 - don't enable --auto by default
diff --git a/hledger-web/CHANGES.md b/hledger-web/CHANGES.md
index e68e0468a..3833a993f 100644
--- a/hledger-web/CHANGES.md
+++ b/hledger-web/CHANGES.md
@@ -1,7 +1,14 @@
 User-visible changes in hledger-web.
 See also the hledger changelog.
 
-# 70e85d8e
+# 1.17.1 2020-03-19
+
+- require newer Decimal, math-functions, fixing inconsistent rounding
+  Decimal 0.5.1+ changed to banker's rounding (round to nearest even
+  number), and math-functions 0.3.3.0 (used by roi) fixed various
+  precision-related issues. Now we require the latest versions of these.
+  This was causing some functional test failures when building with old
+  GHCs/snapshots.
 
 # 1.17 2020-03-01
 
diff --git a/hledger/CHANGES.md b/hledger/CHANGES.md
index 74b12df9e..71e130c3a 100644
--- a/hledger/CHANGES.md
+++ b/hledger/CHANGES.md
@@ -1,7 +1,11 @@
 User-visible changes in the hledger command line tool and library.
 
 
-# 70e85d8e
+# 1.17.1.1 2020-03-19
+
+- update bounds after some belated hledger-* version bumps
+
+# 1.17.1 2020-03-19
 
 - csv: amount1 no longer forces a second posting or second posting amount.
   The "special handling for pre 1.17 rules" should now be less
@@ -15,6 +19,11 @@ User-visible changes in the hledger command line tool and library.
 
 - journal: inclusive balance assignments now work (#1207)
 
+- require newer Decimal, math-functions libs to ensure consistent
+  rounding behaviour, even when built with old GHCs/snapshots. 
+  hledger uses banker's rounding (rounds to nearest even number, eg
+  0.5 with with zero decimal places is "0").
+
 # 1.17 2020-03-01
 
 ## General