diff --git a/week04_[recap]_deep_learning/practice_tensorflow.ipynb b/week04_[recap]_deep_learning/practice_tensorflow.ipynb
index 3d1d92bcf..b1adf8660 100644
--- a/week04_[recap]_deep_learning/practice_tensorflow.ipynb
+++ b/week04_[recap]_deep_learning/practice_tensorflow.ipynb
@@ -316,7 +316,7 @@
"\n",
"Here's what you should see:\n",
"\n",
- "\n",
+ "\n",
"\n",
"Tensorboard also allows you to draw graphs (e.g. learning curves), record images & audio ~~and play flash games~~. This is useful when monitoring learning progress and catching some training issues.\n",
"\n",
diff --git a/week04_approx_rl/homework_lasagne.ipynb b/week04_approx_rl/homework_lasagne.ipynb
index f19003152..f3334f096 100644
--- a/week04_approx_rl/homework_lasagne.ipynb
+++ b/week04_approx_rl/homework_lasagne.ipynb
@@ -206,7 +206,7 @@
"# Building a DQN (2 pts)\n",
"Here we define a simple agent that maps game images into Qvalues using simple convolutional neural network.\n",
"\n",
- "![scheme](https://s18.postimg.org/gbmsq6gmx/dqn_scheme.png)"
+ "![scheme](https://s18.postimg.cc/gbmsq6gmx/dqn_scheme.png)"
]
},
{
diff --git a/week08_pomdp/practice_tensorflow.ipynb b/week08_pomdp/practice_tensorflow.ipynb
index 47e547849..d7e9a6839 100644
--- a/week08_pomdp/practice_tensorflow.ipynb
+++ b/week08_pomdp/practice_tensorflow.ipynb
@@ -466,7 +466,7 @@
"### Training on parallel games\n",
"\n",
"We introduce a class called EnvPool - it's a tool that handles multiple environments for you. Here's how it works:\n",
- "![img](https://s7.postimg.org/4y36s2b2z/env_pool.png)"
+ "![img](https://s7.postimg.cc/4y36s2b2z/env_pool.png)"
]
},
{
diff --git a/week09_policy_II/seminar_TRPO_pytorch.ipynb b/week09_policy_II/seminar_TRPO_pytorch.ipynb
index 413d3a9f1..d97e74301 100644
--- a/week09_policy_II/seminar_TRPO_pytorch.ipynb
+++ b/week09_policy_II/seminar_TRPO_pytorch.ipynb
@@ -731,7 +731,7 @@
"\n",
"In this section, you're invited to implement a better rollout strategy called _vine_.\n",
"\n",
- "![img](https://s17.postimg.org/i90chxgvj/vine.png)\n",
+ "![img](https://s17.postimg.cc/i90chxgvj/vine.png)\n",
"\n",
"In most gym environments, you can actually backtrack by using states. You can find a wrapper that saves/loads states in [the mcts seminar](https://github.com/yandexdataschool/Practical_RL/blob/master/week10_planning/seminar_MCTS.ipynb).\n",
"\n",
diff --git a/week09_policy_II/seminar_TRPO_tensorflow.ipynb b/week09_policy_II/seminar_TRPO_tensorflow.ipynb
index b10aacf16..1084b55ad 100644
--- a/week09_policy_II/seminar_TRPO_tensorflow.ipynb
+++ b/week09_policy_II/seminar_TRPO_tensorflow.ipynb
@@ -670,7 +670,7 @@
"\n",
"In this section, you're invited to implement a better rollout strategy called _vine_.\n",
"\n",
- "![img](https://s17.postimg.org/i90chxgvj/vine.png)\n",
+ "![img](https://s17.postimg.cc/i90chxgvj/vine.png)\n",
"\n",
"In most gym environments, you can actually backtrack by using states. You can find a wrapper that saves/loads states in [the mcts seminar](https://github.com/yandexdataschool/Practical_RL/blob/master/week10_planning/seminar_MCTS.ipynb).\n",
"\n",
diff --git a/week09_policy_II/seminar_TRPO_theano.ipynb b/week09_policy_II/seminar_TRPO_theano.ipynb
index 1abb44cc1..d8e03a73f 100644
--- a/week09_policy_II/seminar_TRPO_theano.ipynb
+++ b/week09_policy_II/seminar_TRPO_theano.ipynb
@@ -674,7 +674,7 @@
"\n",
"In this section, you're invited to implement a better rollout strategy called _vine_.\n",
"\n",
- "![img](https://s17.postimg.org/i90chxgvj/vine.png)\n",
+ "![img](https://s17.postimg.cc/i90chxgvj/vine.png)\n",
"\n",
"In most gym environments, you can actually backtrack by using states. You can find a wrapper that saves/loads states in [the mcts seminar](https://github.com/yandexdataschool/Practical_RL/blob/master/week10_planning/seminar_MCTS.ipynb).\n",
"\n",