diff --git a/estimator.cabal b/estimator.cabal
--- a/estimator.cabal
+++ b/estimator.cabal
@@ -1,5 +1,5 @@
 name:                estimator
-version:             1.1.0.0
+version:             1.1.0.1
 synopsis:            State-space estimation algorithms such as Kalman Filters
 description:
   The goal of this library is to simplify implementation and use of
@@ -31,10 +31,11 @@
 source-repository    this
   type:     git
   location: https://github.com/GaloisInc/estimator
-  tag:      1.1.0.0
+  tag:      1.1.0.1
 
 Flag werror
   description: Make warnings errors
+  manual: True
   default: False
 
 library
@@ -53,7 +54,7 @@
                        ad >=4.2,
                        distributive >=0.4,
                        lens >=4.6,
-                       linear >=1.16 && <1.17,
+                       linear >=1.16 && <1.19,
                        reflection >=1.5
   default-language:    Haskell2010
   ghc-options:         -Wall
diff --git a/src/Numeric/Estimator/Augment.hs b/src/Numeric/Estimator/Augment.hs
--- a/src/Numeric/Estimator/Augment.hs
+++ b/src/Numeric/Estimator/Augment.hs
@@ -26,6 +26,7 @@
 import Data.Traversable
 import Linear
 import Numeric.Estimator.Class
+import Prelude
 
 -- | Holder for the basic state vector plus the augmented extra state.
 data AugmentState state extra a = AugmentState { getState :: state a, getExtra :: extra a }
diff --git a/src/Numeric/Estimator/KalmanFilter.hs b/src/Numeric/Estimator/KalmanFilter.hs
--- a/src/Numeric/Estimator/KalmanFilter.hs
+++ b/src/Numeric/Estimator/KalmanFilter.hs
@@ -18,6 +18,7 @@
 import Numeric.AD.Mode.Reverse
 import Numeric.Estimator.Class
 import Numeric.Estimator.Matrix
+import Prelude
 
 -- | All variants of Kalman Filter, at their core, maintain the
 -- parameters of a multi-variate normal distribution.
diff --git a/src/Numeric/Estimator/Model/Coordinate.hs b/src/Numeric/Estimator/Model/Coordinate.hs
--- a/src/Numeric/Estimator/Model/Coordinate.hs
+++ b/src/Numeric/Estimator/Model/Coordinate.hs
@@ -21,6 +21,7 @@
 import Data.Foldable
 import Data.Traversable
 import Linear
+import Prelude
 
 -- * Navigation frame
 
diff --git a/src/Numeric/Estimator/Model/Symbolic.hs b/src/Numeric/Estimator/Model/Symbolic.hs
--- a/src/Numeric/Estimator/Model/Symbolic.hs
+++ b/src/Numeric/Estimator/Model/Symbolic.hs
@@ -1,5 +1,3 @@
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-
 {- |
 Description: Support for purely symbolic models