diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,8 @@
+# 1.3.11   [2020-06-04]
+
+  - bugfix: Fix check for balanced transactions in the presence of commodities.
+  - dependencies: Fix build with hledger-lib-1.18
+
 # 1.3.10   [2020-01-14]
 
   - dependencies: Support megaparsec-8
diff --git a/hledger-iadd.cabal b/hledger-iadd.cabal
--- a/hledger-iadd.cabal
+++ b/hledger-iadd.cabal
@@ -1,5 +1,5 @@
 name:                hledger-iadd
-version:             1.3.10
+version:             1.3.11
 synopsis:            A terminal UI as drop-in replacement for hledger add
 description:         This is a terminal UI as drop-in replacement for hledger add.
                      .
@@ -61,7 +61,7 @@
                      , Data.Time.Ext
   default-language:    Haskell2010
   build-depends:       base >= 4.9 && < 5
-                     , hledger-lib >= 1.14 && < 1.17
+                     , hledger-lib >= 1.14 && < 1.19
                      , brick >= 0.27
                      , vty >= 5.4
                      , text
@@ -88,7 +88,7 @@
   default-language:    Haskell2010
   build-depends:       base >= 4.9 && < 5
                      , hledger-iadd
-                     , hledger-lib >= 1.14 && < 1.17
+                     , hledger-lib >= 1.14 && < 1.19
                      , brick >= 0.27
                      , vty >= 5.4
                      , text
@@ -116,7 +116,7 @@
   default-language:   Haskell2010
   build-depends:      base >= 4.9 && < 5
                     , hledger-iadd
-                    , hledger-lib >= 1.14 && < 1.17
+                    , hledger-lib >= 1.14 && < 1.19
                     , text
                     , transformers >= 0.3
                     , time >= 1.5
diff --git a/src/Model.hs b/src/Model.hs
--- a/src/Model.hs
+++ b/src/Model.hs
@@ -276,14 +276,12 @@
 
 -- | Returns True if all postings balance and the transaction is not empty
 transactionBalanced :: HL.Transaction -> Bool
-transactionBalanced trans =
-  let (rsum, _, _) = HL.transactionPostingBalances trans
-  in HL.isZeroMixedAmount rsum
+transactionBalanced trans = HL.isTransactionBalanced Nothing trans
 
 -- | Computes the sum of all postings in the transaction and inverts it
 negativeAmountSum :: HL.Transaction -> HL.MixedAmount
 negativeAmountSum trans =
-  let (rsum, _, _) = HL.transactionPostingBalances trans
+  let rsum = HL.sumPostings $ HL.realPostings trans
   in HL.divideMixedAmount (-1) rsum
 
 -- | Compare two transaction descriptions based on their number of occurences in
diff --git a/src/View.hs b/src/View.hs
--- a/src/View.hs
+++ b/src/View.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE CPP #-}
 
 module View
   ( viewState
@@ -14,16 +15,27 @@
 import           Data.Semigroup ((<>))
 import           Data.Text (Text)
 import qualified Data.Text as T
-import           Data.Time hiding (parseTime)
 import qualified Hledger as HL
 
+-- hledger-lib 1.17 will switch showTransaction to ISO date format, which means
+-- that ISO dates yyyy-mm-dd will be added to the journal instead of yyyy/mm/dd.
+--
+-- Thus, for hledger-lib >=1.17, we also show the ISO format in the UI
+#if !MIN_VERSION_hledger_lib(1,16,99)
+import           Data.Time hiding (parseTime)
+#endif
+
 import           Model
 
 viewState :: Step -> Widget n
 viewState (DateQuestion comment) = txt $
   if T.null comment then " " else viewComment comment
 viewState (DescriptionQuestion date comment) = txt $
+#if MIN_VERSION_hledger_lib(1,16,99)
+  T.pack (show date)
+#else
   T.pack (formatTime defaultTimeLocale "%Y/%m/%d" date)
+#endif
   <> viewComment comment
 viewState (AccountQuestion trans comment) = txt $
   showTransaction trans <> viewComment comment