diff --git a/.travis.yml b/.travis.yml
index 0540d47..a7c1584 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -235,7 +235,7 @@ matrix:
             - clang-3.5
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.5
+            - llvm-toolchain-precise-3.5
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.5 CXXSTD=c++11 ADDRESS_MODEL=64
@@ -245,7 +245,7 @@ matrix:
             - clang-3.5
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.5
+            - llvm-toolchain-precise-3.5
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.6 CXXSTD=c++03 ADDRESS_MODEL=64
@@ -255,7 +255,7 @@ matrix:
             - clang-3.6
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.6
+            - llvm-toolchain-precise-3.6
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.6 CXXSTD=c++11 ADDRESS_MODEL=64
@@ -265,7 +265,7 @@ matrix:
             - clang-3.6
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.6
+            - llvm-toolchain-precise-3.6
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.7 CXXSTD=c++03 ADDRESS_MODEL=64
@@ -275,7 +275,7 @@ matrix:
             - clang-3.7
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.7
+            - llvm-toolchain-precise-3.7
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.7 CXXSTD=c++11 ADDRESS_MODEL=64
@@ -285,7 +285,7 @@ matrix:
             - clang-3.7
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.7
+            - llvm-toolchain-precise-3.7
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.8 CXXSTD=c++03 ADDRESS_MODEL=64
@@ -295,7 +295,7 @@ matrix:
             - clang-3.8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.8
+            - llvm-toolchain-precise-3.8
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.8 CXXSTD=c++11 ADDRESS_MODEL=64
@@ -305,7 +305,7 @@ matrix:
             - clang-3.8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.8
+            - llvm-toolchain-precise-3.8
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.8 CXXSTD=c++14 ADDRESS_MODEL=64
@@ -315,7 +315,7 @@ matrix:
             - clang-3.8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.8
+            - llvm-toolchain-precise-3.8
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.8 CXXSTD=c++1z ADDRESS_MODEL=64
@@ -325,7 +325,7 @@ matrix:
             - clang-3.8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.8
+            - llvm-toolchain-precise-3.8
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=c++03 ADDRESS_MODEL=64
@@ -608,7 +608,7 @@ matrix:
             - clang-3.5
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.5
+            - llvm-toolchain-precise-3.5
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.6 CXXSTD=c++11 ADDRESS_MODEL=32
@@ -618,7 +618,7 @@ matrix:
             - clang-3.6
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.6
+            - llvm-toolchain-precise-3.6
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.7 CXXSTD=c++11 ADDRESS_MODEL=32
@@ -628,7 +628,7 @@ matrix:
             - clang-3.7
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.7
+            - llvm-toolchain-precise-3.7
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.8 CXXSTD=c++11 ADDRESS_MODEL=32
@@ -638,7 +638,7 @@ matrix:
             - clang-3.8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-3.8
+            - llvm-toolchain-precise-3.8
 
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=c++11 ADDRESS_MODEL=32