diff --git a/README.markdown b/README.markdown
index ce7e57e9..fb48324f 100644
--- a/README.markdown
+++ b/README.markdown
@@ -45,8 +45,8 @@ There are a few different packages under the Déjà Fu umbrella:
 
 |   | Version | Summary |
 | - | ------- | ------- |
-| [concurrency][h:conc]    | 1.8.1.0  | Typeclasses, functions, and data types for concurrency and STM. |
-| [dejafu][h:dejafu]       | 2.1.0.1  | Systematic testing for Haskell concurrency. |
+| [concurrency][h:conc]    | 1.9.0.0  | Typeclasses, functions, and data types for concurrency and STM. |
+| [dejafu][h:dejafu]       | 2.1.0.2  | Systematic testing for Haskell concurrency. |
 | [hunit-dejafu][h:hunit]  | 2.0.0.1  | Deja Fu support for the HUnit test framework. |
 | [tasty-dejafu][h:tasty]  | 2.0.0.1  | Deja Fu support for the Tasty test framework. |
 
diff --git a/concurrency/CHANGELOG.rst b/concurrency/CHANGELOG.rst
index da21eb99..fc82c1a2 100644
--- a/concurrency/CHANGELOG.rst
+++ b/concurrency/CHANGELOG.rst
@@ -6,8 +6,11 @@ standard Haskell versioning scheme.
 
 .. _PVP: https://pvp.haskell.org/
 
-unreleased
-==========
+1.9.0.0 (2020-02-26)
+====================
+
+* Git: :tag:`concurrency-1.9.0.0`
+* Hackage: :hackage:`concurrency-1.9.0.0`
 
 Changed
 ~~~~~~~
diff --git a/concurrency/Control/Concurrent/Classy/STM/TBQueue.hs b/concurrency/Control/Concurrent/Classy/STM/TBQueue.hs
index 758ca175..6e95156a 100644
--- a/concurrency/Control/Concurrent/Classy/STM/TBQueue.hs
+++ b/concurrency/Control/Concurrent/Classy/STM/TBQueue.hs
@@ -41,7 +41,7 @@ import           Numeric.Natural
 -- | 'TBQueue' is an abstract type representing a bounded FIFO
 -- channel.
 --
--- @since unreleased
+-- @since 1.9.0.0
 data TBQueue stm a
    = TBQueue (TVar stm Natural)
              (TVar stm [a])
@@ -51,7 +51,7 @@ data TBQueue stm a
 
 -- | Builds and returns a new instance of 'TBQueue'
 --
--- @since unreleased
+-- @since 1.9.0.0
 newTBQueue :: MonadSTM stm
   => Natural -- ^ maximum number of elements the queue can hold
   -> stm (TBQueue stm a)
@@ -178,7 +178,7 @@ unGetTBQueue (TBQueue rsize readT wsize _ _) a = do
 
 -- |Return the length of a 'TBQueue'.
 --
--- @since unreleased
+-- @since 1.9.0.0
 lengthTBQueue :: MonadSTM stm => TBQueue stm a -> stm Natural
 lengthTBQueue (TBQueue rsize _ wsize _ size) = do
   r <- readTVar rsize
diff --git a/concurrency/concurrency.cabal b/concurrency/concurrency.cabal
index 35a9ba6c..48aa5547 100755
--- a/concurrency/concurrency.cabal
+++ b/concurrency/concurrency.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                concurrency
-version:             1.8.1.0
+version:             1.9.0.0
 synopsis:            Typeclasses, functions, and data types for concurrency and STM.
 
 description:
@@ -32,7 +32,7 @@ source-repository head
 source-repository this
   type:     git
   location: https://github.com/barrucadu/dejafu.git
-  tag:      concurrency-1.8.1.0
+  tag:      concurrency-1.9.0.0
 
 library
   exposed-modules:     Control.Monad.Conc.Class
diff --git a/dejafu/CHANGELOG.rst b/dejafu/CHANGELOG.rst
index 5b30cb08..3cd59e00 100644
--- a/dejafu/CHANGELOG.rst
+++ b/dejafu/CHANGELOG.rst
@@ -7,6 +7,18 @@ standard Haskell versioning scheme.
 .. _PVP: https://pvp.haskell.org/
 
 
+2.1.0.2 (2020-02-29)
+--------------------
+
+* Git: :tag:`dejafu-2.1.0.2`
+* Hackage: :hackage:`dejafu-2.1.0.2`
+
+Miscellaneous
+~~~~~~~~~~~~~
+
+* The upper version bound on :hackage:`concurrency` is <1.10.
+
+
 2.1.0.1 (2019-10-04)
 --------------------
 
diff --git a/dejafu/dejafu.cabal b/dejafu/dejafu.cabal
index 2dd81866..1195430f 100755
--- a/dejafu/dejafu.cabal
+++ b/dejafu/dejafu.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dejafu
-version:             2.1.0.1
+version:             2.1.0.2
 synopsis:            A library for unit-testing concurrent programs.
 
 description:
@@ -33,7 +33,7 @@ source-repository head
 source-repository this
   type:     git
   location: https://github.com/barrucadu/dejafu.git
-  tag:      dejafu-2.1.0.1
+  tag:      dejafu-2.1.0.2
 
 library
   exposed-modules:     Test.DejaFu
@@ -59,7 +59,7 @@ library
   -- other-modules:       
   -- other-extensions:    
   build-depends:       base              >=4.9 && <5
-                     , concurrency       >=1.7 && <1.9
+                     , concurrency       >=1.7 && <1.10
                      , containers        >=0.5 && <0.7
                      , contravariant     >=1.2 && <1.6
                      , deepseq           >=1.1 && <2
diff --git a/doc/getting_started.rst b/doc/getting_started.rst
index bcb21044..8e00db84 100644
--- a/doc/getting_started.rst
+++ b/doc/getting_started.rst
@@ -27,8 +27,8 @@ There are a few different packages under the Déjà Fu umbrella:
 .. csv-table::
    :header: "Package", "Version", "Summary"
 
-   ":hackage:`concurrency`",  "1.8.1.0",  "Typeclasses, functions, and data types for concurrency and STM"
-   ":hackage:`dejafu`",       "2.1.0.1", "Systematic testing for Haskell concurrency"
+   ":hackage:`concurrency`",  "1.9.0.0",  "Typeclasses, functions, and data types for concurrency and STM"
+   ":hackage:`dejafu`",       "2.1.0.2", "Systematic testing for Haskell concurrency"
    ":hackage:`hunit-dejafu`", "2.0.0.1",  "Déjà Fu support for the HUnit test framework"
    ":hackage:`tasty-dejafu`", "2.0.0.1",  "Déjà Fu support for the tasty test framework"